A Compact Nanoconfined Sulfur Cathode for High-Performance Lithium-Sulfur Batteries

Li, Zhen; Guan, Buyuan; Zhang, Jin Tao; Lou, Xiong Wen David

doi:10.1016/j.joule.2017.06.003

Cited by 265 publications

(163 citation statements)

References 58 publications

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“…This confirms their dominant mesoporous features and is consistent with the results of TEM analysis. [22] The peak intensity of CNT@TiO 2−x decreases significantly after hydrogenation, which is due to the increase in defect density of the TiO 2−x structure. The pore size distribution explains the peaks evident at 3.6 and 6.2 nm for CNT@TiO 2−x , and at 3.6 and 7.3 nm for CNT@TiO 2 .…”

Section: Resultsmentioning

confidence: 97%

Enhancing Catalytic Activity of Titanium Oxide in Lithium–Sulfur Batteries by Band Engineering

Wang

Zhang

Chen

et al. 2019

Advanced Energy Materials

346

216

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The altering of electronic states of metal oxides offers a promising opportunity to realize high‐efficiency surface catalysis, which play a key role in regulating polysulfides (PS) redox in lithium–sulfur (Li–S) batteries. However, little effort has been devoted to understanding the relationship between the electronic state of metal oxides and a catalyst's properties in Li–S cells. Herein, defect‐rich heterojunction electrocatalysts composed of ultrathin TiO2‐x nanosheets and carbon nanotubes (CNTs) for Li–S batteries are reported. Theoretical simulations indicate that oxygen vacancies and heterojunction can enhance electronic conductivity and chemical adsorption. Spectroscopy and electrochemical techniques further indicate that the rich surface vacancies in TiO2‐x nanosheets result in highly activated trapping sites for LiPS and lower energy barriers for fast Li ion mobility. Meanwhile, the redistribution of electrons at the heterojunction interfaces realizes accelerated surface electron exchange. Coupled with a polyacrylate terpolymer (LA132) binder, the CNT@TiO2‐x–S electrodes exhibit a long cycle life of more than 300 cycles at 1 C and a high area capacity of 5.4 mAh cm−2. This work offers a new perspective on understanding catalyst design in energy storage devices through band engineering.

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Section: Resultsmentioning

confidence: 97%

Enhancing Catalytic Activity of Titanium Oxide in Lithium–Sulfur Batteries by Band Engineering

Wang

Zhang

Chen

et al. 2019

Advanced Energy Materials

346

216

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show abstract

“…5b). Such a compact architecture may help to provide relatively good structural robustness and suppress parasitic side reactions between electrode and electrolyte [42, 43]. For comparison, Fe 2 O 3 and Co 3 O 4 nanostructures (derived from MIL-88B and ZIF-67) reveal Brunauer–Emmett–Teller (BET) surface areas of 7 and 45 m 2 g −1 , respectively (Fig.…”

Section: Resultsmentioning

confidence: 99%

Metal–Organic Framework-Assisted Synthesis of Compact Fe2O3 Nanotubes in Co3O4 Host with Enhanced Lithium Storage Properties

et al. 2018

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Transition metal oxides are promising candidates for the high-capacity anode material in lithium-ion batteries. The electrochemical performance of transition metal oxides can be improved by constructing suitable composite architectures. Herein, we demonstrate a metal–organic framework (MOF)-assisted strategy for the synthesis of a hierarchical hybrid nanostructure composed of Fe2O3 nanotubes assembled in Co3O4 host. Starting from MOF composite precursors (Fe-based MOF encapsulated in a Co-based host matrix), a complex structure of Co3O4 host and engulfed Fe2O3 nanotubes was prepared by a simple annealing treatment in air. By virtue of their structural and compositional features, these hierarchical composite particles reveal enhanced lithium storage properties when employed as anodes for lithium-ion batteries. Electronic supplementary materialThe online version of this article (10.1007/s40820-018-0197-1) contains supplementary material, which is available to authorized users.

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“…Conventional LSBs generally consist of sulfur-based cathode, binder, separator, organic liquid electrolyte, lithium metal anode, and current collector (Kang et al., 2016). Sulfur as a cathode is naturally abundant, inexpensive, and environment friendly (Zhao et al., 2014c, Su et al., 2016, Mi et al., 2016, Jin et al., 2003, Li et al., 2017b). Metallic lithium as an anode possesses the lowest density and high electron negativity and can deliver a high specific capacity of 3,860 mAh g −1 (Liu et al., 2016).…”

Section: Introductionmentioning

confidence: 99%

Advances in Cathode Materials for High-Performance Lithium-Sulfur Batteries

et al. 2018

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Lithium-sulfur batteries (LSBs) represent a promising energy storage technology, and they show potential for next-generation high-energy systems due to their high specific capacity, abundant constitutive resources, non-toxicity, low cost, and environment friendliness. Unlike their ubiquitous lithium-ion battery counterparts, the application of LSBs is challenged by several obstacles, including short cycling life, limited sulfur loading, and severe shuttling effect of polysulfides. To make LSBs a viable technology, it is very important to design and synthesize outstanding cathode materials with novel structures and properties. In this review, we summarize recent progress in designs, preparations, structures, and properties of cathode materials for LSBs, emphasizing binary, ternary, and quaternary sulfur-based composite materials. We especially highlight the utilization of carbons to construct sulfur-based composite materials in this exciting field. An extensive discussion of the emerging challenges and possible future research directions for cathode materials for LSBs is provided.

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A Compact Nanoconfined Sulfur Cathode for High-Performance Lithium-Sulfur Batteries

Cited by 265 publications

References 58 publications

Enhancing Catalytic Activity of Titanium Oxide in Lithium–Sulfur Batteries by Band Engineering

Enhancing Catalytic Activity of Titanium Oxide in Lithium–Sulfur Batteries by Band Engineering

Metal–Organic Framework-Assisted Synthesis of Compact Fe2O3 Nanotubes in Co3O4 Host with Enhanced Lithium Storage Properties

Advances in Cathode Materials for High-Performance Lithium-Sulfur Batteries

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