Volume 10, Issue 12 2200616
Research Article

3D Cellulose Graphene Aerogel with Self-Redox CeO2 as Li2S Host for High-Performance Li–S Battery

Hao Yu

Hao Yu

National Base for International Science & Technology Cooperation, National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery, Hunan Province Key Laboratory of Electrochemical Energy Storage & Conversion, School of Chemistry, Xiangtan University, Xiangtan, 411105 China

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Xi Zhou

Xi Zhou

National Base for International Science & Technology Cooperation, National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery, Hunan Province Key Laboratory of Electrochemical Energy Storage & Conversion, School of Chemistry, Xiangtan University, Xiangtan, 411105 China

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Peng Zeng

Peng Zeng

National Base for International Science & Technology Cooperation, National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery, Hunan Province Key Laboratory of Electrochemical Energy Storage & Conversion, School of Chemistry, Xiangtan University, Xiangtan, 411105 China

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Changmeng Guo

Changmeng Guo

National Base for International Science & Technology Cooperation, National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery, Hunan Province Key Laboratory of Electrochemical Energy Storage & Conversion, School of Chemistry, Xiangtan University, Xiangtan, 411105 China

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Hong Liu

Hong Liu

National Base for International Science & Technology Cooperation, National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery, Hunan Province Key Laboratory of Electrochemical Energy Storage & Conversion, School of Chemistry, Xiangtan University, Xiangtan, 411105 China

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Xiaowei Guo

Xiaowei Guo

School of Chemistry & Material Engineering, Xinxiang University, Xinxiang, Henan, 453003 China

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Baobao Chang

Baobao Chang

Key Laboratory of Materials Processing and Mold of Ministry of Education, Zhengzhou University, Zhengzhou, Henan, 450001 China

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Manfang Chen

Corresponding Author

Manfang Chen

National Base for International Science & Technology Cooperation, National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery, Hunan Province Key Laboratory of Electrochemical Energy Storage & Conversion, School of Chemistry, Xiangtan University, Xiangtan, 411105 China

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Jincang Su

Corresponding Author

Jincang Su

National Base for International Science & Technology Cooperation, National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery, Hunan Province Key Laboratory of Electrochemical Energy Storage & Conversion, School of Chemistry, Xiangtan University, Xiangtan, 411105 China

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Xianyou Wang

Corresponding Author

Xianyou Wang

National Base for International Science & Technology Cooperation, National Local Joint Engineering Laboratory for Key Materials of New Energy Storage Battery, Hunan Province Key Laboratory of Electrochemical Energy Storage & Conversion, School of Chemistry, Xiangtan University, Xiangtan, 411105 China

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First published: 14 September 2022

Abstract

Lithium sulfide is considered the promising cathode material of a Li–S battery because of its high theoretical capacity, high melting point, affordable volume expansion, and lithium composition. However, the quick capacity fading and high activation energy barrier due to low electronic and ionic conductivity and polysulfide shuttle effect still restrict the practical application of the Li2S cathode. Herein, CeO2 is introduced with unique self-redox characteristics into cellulose graphene aerogel (CGA) with the 3D interconnected structure (CGA/CeO2) as the host of Li2S. It is found that CGA/CeO2 can provide plentiful three-phase boundary for the chemisorption to LiPSs through the strong polarity of CeO2. Moreover, the ultrastrong polarity of CeO2 can restrain the LiPSs shuttle, and CeO2 can spontaneously oxidize polysulfide, thus boosting the conversion reaction kinetics and comprehensive electrochemical performances of Li–S battery based on Li2S cathode. As a result, these features reciprocate Li2S-CGA/CeO2 cathode excellent electrochemical performances. Therefore, this work not only provides a significant exploration for the mechanical explanation of the cerium oxide catalytic conversion reaction but also provides a brand-new idea for the excellent electric catalyst for the catalytic conversion reaction of polysulfide in lithium–sulfide batteries.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

Research data are not shared.

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