journal article·2018-06-08Open access

Dynamic Hosts for High-Performance Li–S Batteries Studied by Cryogenic Transmission Electron Microscopy and in Situ X-ray Diffraction

Xiao-Chen Liu, Yao Yang, Jingjie Wu, Miao Liu, Sophia P. Zhou, Barnaby D. A. Levin, Xiao-Dong Zhou, Hengjiang Cong, David A. Muller, Pulickel M. Ajayan, Héctor D. Abruña, Fu-Sheng Ke

ACS Energy Letters· Volume 3· Issue 6

Abstract

Developing a high-performance sulfur host is central to the commercialization and general development of lithium–sulfur batteries. Here, for the first time, we propose the concept of dynamic hosts for lithium–sulfur batteries and elucidate the mechanism through which TiS2 acts in such a fashion, using in situ X-ray diffraction and cryogenic scanning transmission electron microscopy (cryo-STEM). A TiS2–S composite electrode delivered a reversible capacity of 1120 mAh g–1 at 0.3 C after 200 cycles with a capacity retention of 97.0% and capacities of 886 and 613 mAh g–1 at 1.0 C up to 200 and 1000 cycles, respectively. Finally, our results indicate that it is LixTiS2 (0 < x ≤ 1), rather than TiS2, that effectively traps polysulfides and catalytically decomposes Li2S.
Source: openalex_inverted_index · Quality: candidate unverified · Source record ↗

Research context

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Thermal Expansion and Ionic Conductivity

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China

Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States

Department of Materials Science and Nano Engineering, Rice University, Houston, Texas 77005, United States

Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States

School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States

Department of Chemical Engineering, Institute of Materials Research and Innovation, University of Louisiana at Lafayette, Lafayette, Louisiana 70504, United States

Kavli Institute for Nanoscale Science, Cornell University, Ithaca, New York 14853, United States

Funding

Basic Energy Sciences · National Natural Science Foundation of China

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