文献类型：期刊文献

英文题名：3D Cellulose Graphene Aerogel with Self-Redox CeO2 as Li2S Host for High-Performance Li-S Battery

作者：Yu, Hao[1];Zhou, Xi[1];Zeng, Peng[1];Guo, Changmeng[1];Liu, Hong[1];Guo, Xiaowei[2];Chang, Baobao[3];Chen, Manfang[1];Su, Jincang[1];Wang, Xianyou[1]

第一作者：Yu, Hao

通讯作者：Chen, MF[1];Su, JC[1];Wang, XY[1]

机构：[1]Xiangtan Univ, Hunan Prov Key Lab Electrochem Energy Storage & C, Natl Local Joint Engn Lab Key Mat New Energy Stor, Natl Base Int Sci & Technol Cooperat,Sch Chem, Xiangtan 411105, Peoples R China;[2]Xinxiang Univ, Sch Chem & Mat Engn, Xinxiang 453003, Henan, Peoples R China;[3]Zhengzhou Univ, Minist Educ, Key Lab Mat Proc & Mold, Zhengzhou 450001, Henan, Peoples R China

第一机构：Xiangtan Univ, Hunan Prov Key Lab Electrochem Energy Storage & C, Natl Local Joint Engn Lab Key Mat New Energy Stor, Natl Base Int Sci & Technol Cooperat,Sch Chem, Xiangtan 411105, Peoples R China

通讯机构：[1]corresponding author), Xiangtan Univ, Hunan Prov Key Lab Electrochem Energy Storage & C, Natl Local Joint Engn Lab Key Mat New Energy Stor, Natl Base Int Sci & Technol Cooperat,Sch Chem, Xiangtan 411105, Peoples R China.

年份：0

外文期刊名：ENERGY TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000858983100001)】；

基金：H.Y. and X.Z. contributed equally to this work. This work was supported by National Natural Science Foundation of China (grant no. 22109135); Key Project of Strategic New Industry of Hunan Province (grant no. 2019GK2032); and Postgraduate Scientific Research Innovation Project of Hunan Province (grant no. CX20210517). The authors would like to thank Shiyanjia Lab for the XPS test. The electrochemical testing of this work was assisted by Jiangsu Donghua Test Technology Co., Ltd.

语种：英文

外文关键词：cerium dioxide; electrocatalysts; Li-S batteries; lithium sulfide; self-redox

摘要：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.