Publications by authors named "Tianli Han"

13 Publications

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Engineering a novel microcapsule of CuS core and SnS quantum dot/carbon nanotube shell as a Li-ion battery anode.

Chem Commun (Camb) 2021 Nov 26. Epub 2021 Nov 26.

Department of Modern Mechanics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.

A novel microcapsule composed of CuS and SnS quantum dots (QDs)/carbon nanotubes (CNTs) prepared through a microfluidic approach was developed for a Li-ion battery anode. CNTs enhance the conductivity, while pores in the shell facilitate electrolyte penetration, and void in the microcapsule buffers the volume change. The microcapsule-based anode displayed stable capacity, a Coulombic efficiency of 99.9%, and reversible rate-performance at temperatures of -10 °C and 45 °C, which are significant for developing high-performance energy-storage materials and battery systems.
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http://dx.doi.org/10.1039/d1cc05657cDOI Listing
November 2021

A novel free-standing metal organic frameworks-derived cobalt sulfide polyhedron array for shuttle effect suppressive lithium-sulfur batteries.

Nanotechnology 2021 Nov 24. Epub 2021 Nov 24.

Chinese Academy of Sciences - Intelligent Machines Institute, Science Island 1130 M B, Hefei 230026, Hefei, 230031, CHINA.

Metal-organic-foams (MOFs)-derived nanostructures have received broad attention for secondary batteries. However, common strategies are focusing on the preparation of dispersive materials, which need complicated steps and some additives for making electrodes of batteries. Here, we develop a novel free-standing Co9S8 polyhedron array derived from ZIF-67, which grows on a three-dimensional carbon cloth for lithium-sulfur (Li-S) battery. The polar Co9S8 provides strong chemical binding to immobilize polysulfides, which enables efficiently suppressing of the shuttle effect. The free-standing [email protected] polyhedron array-based cathode exhibits ultrahigh capacity of 1079 mAh g-1 after cycling 100 times at 0.1C, and long cycling life of 500 cycles at 1C, recoverable rate-performance and good temperature tolerance. Furthermore, the adsorption energies towards polysulfides are investigated by using density functional theory (DFT) calculations, which display a strong binding with polysulfides.
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http://dx.doi.org/10.1088/1361-6528/ac3ce5DOI Listing
November 2021

A novel nanosphere-in-nanotube iron phosphide Li-ion battery anode displaying a long cycle life, recoverable rate-performance, and temperature tolerance.

Nanoscale 2021 Oct 1;13(37):15624-15630. Epub 2021 Oct 1.

National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu 210093, P. R. China.

Currently, non-ideal anodes restricts the development of long-term stable Li-ion batteries. Several currently available high-capacity anode candidates are suffering from a large volumetric change during charge and discharge and non-stable solid interphase formation. Here, we develop a novel nanosphere-confined one-dimensional yolk-shell anode taking iron phosphide (FeP) as a demonstrating case study. Multiple FeP nanospheres are encapsulated inside an FeP nanotube through a magnetic field-assisted and templated approach, forming a nanosphere-in-nanotube yolk-shell (NNYS) structure. After long-term 1000 cycles at 2 A g, the NNYS FeP anode shows a good capacity of 560 mA h g, and a coulombic efficiency of 99.8%. A recoverable rate-performance is also obtained after three rounds of tests. Furthermore, the capacities and coulombic efficiency remain stable at temperatures of -10 °C and 45 °C, respectively, indicating good potential for use under different conditions.
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http://dx.doi.org/10.1039/d1nr05294bDOI Listing
October 2021

A Polysulfides-Confined All-in-One Porous Microcapsule Lithium-Sulfur Battery Cathode.

Small 2021 Oct 12;17(41):e2103051. Epub 2021 Sep 12.

National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, Jiangsu, 210093, P. R. China.

Developing emerging materials for high energy-density lithium-sulfur (Li-S) batteries is of great significance to suppress the shuttle effect of polysulfides and to accommodate the volumetric change of sulfur. Here, a novel porous microcapsule system containing a carbon nanotubes/tin dioxide quantum dots/S (CNTs/QDs/S) composite core and a porous shell prepared through a liquid-driven coaxial microfluidic method as Li-S battery cathode is developed. The encapsulated CNTs in the microcapsules provide pathways for electron transport; SnO QDs on CNTs immobilize the polysulfides by strong adsorption, which is verified by using density functional theory calculations on binding energies. The porous shell of the microcapsule is beneficial for ion diffusion and electrolyte penetration. The void inside the microcapsule accommodates the volumetric change of sulfur. The Li-S battery based on the porous CNTs/QDs/S microcapsules displays a high capacity of 1025 mAh g after 100 cycles at 0.1 C. When the sulfur loading is 2.03 mg cm , the battery shows a stable cycling life of 700 cycles, a Coulombic efficiency exceeding 99.9%, a recoverable rate-performance during repeated tests, and a good temperature tolerance at both -5 and 45 °C, which indicates a potential for applications at different conditions.
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http://dx.doi.org/10.1002/smll.202103051DOI Listing
October 2021

A yolk-shell [email protected]@carbon nanochain as shuttle effect suppressive and volume-change accommodating sulfur host for long-life lithium-sulfur batteries.

Nanoscale 2021 Apr;13(16):7744-7750

Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Provincial Engineering Laboratory for New-Energy Vehicle Battery Energy-Storage Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, P.R. China.

A lithium-sulfur (Li-S) battery is considered a promising next-generation secondary battery owing to its high theoretical capacity and energy density. However, the volume change and poor conductivity of sulfur, and the shuttle effect, restrict its practical applications. Herein, we develop a yolk-shell [email protected]@C nanochain as the Li-S battery cathode in which sulfur is encapsulated between the Fe3O4 core and the carbon shell. After cycling 500 times at 0.2C, the [email protected]@C nanochains exhibit a stable capacity of 625 mA h g-1 and a coulombic efficiency exceeding 99.8%. When measuring at temperatures of -5 and 45 °C, the capacities remain stable, and a well-reversible rate performance under repeated testing for three rounds is also achieved. Furthermore, density functional theory (DFT) calculations show large adsorption energies of Fe3O4 towards polysulfides, indicating the capability of suppressing the shuttle effect during long-term charge and discharge.
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http://dx.doi.org/10.1039/d1nr00658dDOI Listing
April 2021

A Self-Healing Flexible Quasi-Solid Zinc-Ion Battery Using All-In-One Electrodes.

Adv Sci (Weinh) 2021 Apr 14;8(8):2004689. Epub 2021 Feb 14.

National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences Nanjing University Nanjing Jiangsu 210093 P. R. China.

Self-healing and flexibility are significant for many emerging applications of secondary batteries, which have attracted broad attention. Herein, a self-healing flexible quasi-solid Zn-ion battery composing of flexible all-in-one cathode (VS nanosheets growing on carbon cloth) and anode (electrochemically deposited Zn nanowires), and a self-healing hydrogel electrolyte, is presented. The free-standing all-in-one electrodes enable a high capacity and robust structure during flexible transformation of the battery, and the hydrogel electrolyte possesses a good self-healing performance. The presented battery remains as a high retention potential even after healing from being cut into six pieces. When bending at 60°, 90°, and 180°, the battery capacities remain 124, 125, and 114 mAh g, respectively, cycling at a current density of 50 mA g. Moreover, after cutting and healing twice, the battery still delivers a stable capacity, indicating a potential use of self-healing and wearable electronics.
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http://dx.doi.org/10.1002/advs.202004689DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8061350PMC
April 2021

General Liquid-Driven Coaxial Flow Focusing Preparation of Novel Microcapsules for Rechargeable Magnesium Batteries.

Adv Sci (Weinh) 2021 Jan 27;8(2):2002298. Epub 2020 Nov 27.

National Key Laboratory of Science and Technology on Micro/Nano Fabrication Key Laboratory for Thin Film and Microfabrication of Ministry of Education Department of Micro/Nano-electronics Shanghai Jiao Tong University Shanghai 200240 P. R. China.

Magnesium batteries have been considered promising candidates for next-generation energy storage systems owing to their high energy density, good safety without dendrite formation, and low cost of magnesium resources. However, high-performance cathodes with stable capacity, good conductivity, and fast ions transport are needed, since many conventional cathodes possess a low performance and poor preparation controllability. Herein, a liquid-driven coaxial flow focusing (LDCFF) approach for preparing a novel microcapsule system with controllable size, high loading, and stable magnesium-storage performance is presented. Taking the MoS-infilled microcapsule as a case study, the magnesium battery cathode based on the microcapsules displays a capacity of 100 mAh g after 100 cycles. High capacity retention is achieved at both low and high temperatures of -10, ‒5, and 45 °C, and a stable rate-performance is also obtained. The influences of the liquid flow rates on the size and shell thickness of the microcapsules are investigated; and electron and ion diffusion properties are also studied by first-principle calculations. The presented LDCFF method is quite general, and the high performance of the microcapsules enables them to find broad applications for making emerging energy-storage materials and secondary battery systems.
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http://dx.doi.org/10.1002/advs.202002298DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7816708PMC
January 2021

A novel [email protected]@hydrogel yolk-shell particle with a high sulfur content for volume-accommodable and polysulfide-adsorptive lithium-sulfur battery cathodes.

Nanotechnology 2020 Nov 18;31(45):455402. Epub 2020 Aug 18.

Key Laboratory of Functional Molecular Solids of the Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People's Republic of China.

High-energy-density secondary batteries are required for many applications such as electric vehicles. Lithium-sulfur (Li-S) batteries are receiving broad attention because of their high theoretical energy density. However, the large volume change of sulfur during cycling, poor conductivity, and the shuttle effect of sulfides severely restrict the Li-storage performance of Li-S batteries. Herein, we present a novel core-shell nanocomposite consisting of a sulfur core and a hydrogel polypyrrole (PPy) shell, enabling an ultra-high sulfur content of about 98.4% within the composite, which greatly exceeds many other conventional composites obtained by coating sulfur onto some hosts. In addition, the void inside the core-shell structure effectively accommodates the volume change; the conductive PPy shell improves the conductivity of the composite; and PPy is able to adsorb polysulfides, suppressing the shuttle effect. After cycling for 200 cycles, the prepared [email protected]@PPy composite retains a stable capacity of 650 mAh g, which is higher than the bare sulfur particles. The composite also exhibits a fast Li ion diffusion coefficient. Furthermore, the density functional theory calculations show the PPy shell is able to adsorb polysulfides efficiently, with a large adsorption energy and charge density transfer.
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http://dx.doi.org/10.1088/1361-6528/abaa72DOI Listing
November 2020

A novel silicon nanoparticles-infilled capsule prepared by an oil-in-water emulsion strategy for high-performance Li-ion battery anodes.

Nanotechnology 2020 Aug 6;31(33):335403. Epub 2020 May 6.

Key Laboratory of Functional Molecular Solids of the Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000 People's Republic of China.

Conventional approaches for preparing yolk-shell nanostructures require complicated procedures such as multi-step coatings and template removal. Herein, we present a new and general strategy for making yolk-shell nanocomposites based on an oil-in-water emulsion system. As a demonstrating case, silicon nanoparticles were dispersed in an oil phase which was in an oil-in-water emulsion; then the oil/water interface was in-situ polymerized to form microcapsules. After carbonization, the shell of microcapsules was formed. The Li-ion battery anodes based on the microcapsules exhibit a good electrochemical performance including stable capacity and high rate-performance. The capacity remains 1100 mAh g after 500 cycles at a current density of 1.9 A g, along with a Coulombic efficiency of ≈ 99.9%. In addition, the method presented here is general, which is applicable for the synthesis of many yolk shell-structured nanocomposites.
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http://dx.doi.org/10.1088/1361-6528/ab90b9DOI Listing
August 2020

An oriented laterally-growing NiCoO nanowire array on a FeO microdisc as a high-capacity and excellent rate-performance secondary battery anode.

Chem Commun (Camb) 2020 Feb;56(17):2618-2621

Key Laboratory for Thin Film and Micro Fabrication of the Ministry of Education, Department of Micro/Nano Electronics, Shanghai Jiao Tong University, Shanghai 200240, P. R. China and Center for High-Performance Computing, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.

A novel hierarchical composite consisting of an ordered NiCo2O4 nanowire array growing on the lateral side of a Fe2O3 microdisc is presented, which was confirmed by X-ray holography technology on a synchrotron radiation station. The composite-based Li-ion battery anode exhibits a high capacity of 1528 mA h g-1 after 200 cycles at 0.2C, a recoverable rate-performance after repeated tests, and robust mechanical properties.
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http://dx.doi.org/10.1039/d0cc00553cDOI Listing
February 2020

An artificial sea urchin with hollow spines: improved mechanical and electrochemical stability in high-capacity Li-Ge batteries.

Nanoscale 2020 Mar 24;12(10):5812-5816. Epub 2020 Jan 24.

Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, P.R. China.

Metallic germanium (Ge) as the anode can deliver a high specific capacity and high rate capability in lithium ion batteries. However, the large volume expansion largely restrains its further application. Herein, we constructed a three-dimensional sea urchin structure consisting of double layered Ge/TiO nanotubes as the spines via a ZnO template-removing method, which displays a capacity as high as 1060 mA h g over 130 cycles. The robust, hollow oxide backbone serves as a strong support to accommodate the morphological change of Ge while the enhanced electron-transfer kinetics is attributed to the Ge content and the intimate contact between Ge and TiO during charging/discharging, which were confirmed using in situ transmission electronic microscopy observations and first-principles simulations. In addition, a high capacity retention of batteries using this hybrid composite as the anode was also achieved at low temperature.
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http://dx.doi.org/10.1039/c9nr09107fDOI Listing
March 2020

A novel spring-structured coaxial hierarchical [email protected] nanowire as a lithium-ion battery anode and its in situ real-time lithiation.

Nanotechnology 2020 Jan 26;31(3):035401. Epub 2019 Sep 26.

Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, People's Republic of China.

High capacity and stable anodes are demanded since the current graphite-based anode does not meet the high-performance requirements of emerging Li-ion battery systems. Herein, we present a novel spring-shaped hierarchical [email protected] nanowire composite, which exhibits good Li-storage performance. The special structure is able to effectively accommodate the change in structure during charge-discharge, and the coaxial hierarchical morphology enables rapid Li ion and electron transfer. The spring-shaped [email protected] anode exhibits a capacity of 770 mAh g, along with a high Coulombic efficiency of 99.8% after 400 cycles. A stable rate performance even after three rounds of measurements is also achievable. In addition, the real-time lithiation of the [email protected] composite is investigated through an in situ transmission electron microscopy technology, which demonstrates the stable structure of the spring-shaped [email protected] composite during the rapid lithiation process.
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http://dx.doi.org/10.1088/1361-6528/ab4848DOI Listing
January 2020

A biomimetic [email protected] composite as highly-efficient adsorbent for removing heavy metal ions in drinking water.

Chemosphere 2019 Jan 2;214:738-742. Epub 2018 Oct 2.

Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, PR China.

Highly efficient adsorbents for drinking water purification are demanded since the contaminants are generally in a low concentration which makes it difficult for conventional adsorbents. Herein, we present a novel biomimetic [email protected] composite as adsorbent with a high adsorption capability towards heavy metal ions including As(V) and Hg(II). The hollow leaf-like SiO scaffold within the adsorbent has a stable chemical property; while on the surface SiO, the chitosan nanoparticle provide a large amount of active sites such as amino and hydroxyl groups for adsorbing heavy metal ions. The special SiO structure also prevents the agglomeration and loss of chitosan, which enables the efficient contact between the functional groups of chitosan and heavy metal ions. The [email protected] composite exhibits maximum adsorption capacities of 204.1 and 198.6 mg g towards Hg(II) and As(V), respectively. In addition, the removal efficiency reaches over 60% within 2 min. The adsorption performance enables the presented biomimetic adsorbent suitable for adsorbing low-concentration heavy metal ions, especially possessing a promising potential for drinking water purification.
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http://dx.doi.org/10.1016/j.chemosphere.2018.09.172DOI Listing
January 2019
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