journal article·2020-12-11

Stepwise Intercalation-Conversion-Intercalation Sodiation Mechanism in CuInS2 Prompting Sodium Storage Performance

Dong Yan, Shaozhuan Huang, Yew Von Lim, Daliang Fang, Yang Shang, Mei Er Pam, Juezhi Yu, Dongbin Xiong, Xue Liang Li, Jian Zhang, Ye Wang, Likun Pan, Ying Bai, Yumeng Shi, Hui Ying Yang

ACS Energy Letters· Volume 5· Issue 12
Publisher page

Abstract

The low charge storage in intercalation-type reaction and the large volume change induced by conversion/alloying reactions greatly limit the practical selection of anodes in sodium-ion batteries (SIBs). Herein, CuInS2 as SIBs anode with an unusual stepwise intercalation-conversion-intercalation reaction mechanism is developed. This mechanism effectively arouses the synergies between conversion and intercalation reactions, thus alleviating the shortcomings of conventional anode materials with either low capacity or severe performance decay. Especially, unlike most of the bimetallic sulfides that usually undergo conversion/alloying dominant reactions, the indium species in CuInS2 control a reversible Na+ intercalation-extraction reaction, which can excite a stepwise and complementary reaction to stabilize performance. As a result, the CuInS2 displays better electrochemical performances as compared with the conversion-type Cu2S. This work is a milestone in the development of high-performance anodes with an appropriate working mechanism and provides significant insights for exploring appropriate anodes in alkali-ion batteries.
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Research context

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced battery technologies research

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

Affiliations

International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China

Pillar of Engineering Product Development, Singapore University of Technology and Design, Singapore 487372, Singapore

Digital Manufacturing and Design Centre, Singapore University of Technology and Design, Singapore, 487372, Singapore

Key Laboratory of Material Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China

Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China

International Joint Laboratory of Renewable Energy Materials and Devices of Henan Province and School of Physics & Electronics, Henan University, Kaifeng 475004, China

Funding

Ministry of Education - Singapore · Department of Education of Guangdong Province · National Natural Science Foundation of China · Science and Technology Project of Shenzhen · Shenzhen Municipality · Henan Province

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