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Towards Low‐Voltage and High‐Capacity Conversion‐Based Oxide Anodes by Configuration Entropy Optimization
Towards Low‐Voltage and High‐Capacity Conversion‐Based Oxide Anodes by Configuration Entropy Optimization
Dr. Lizhi Qian
(School of Materials Science and Engineering Northeastern University 110819 Shenyang PR China)
Jinliang Li
(School of Materials Science and Engineering Northeastern University 110819 Shenyang PR China)
Gongxu Lan
(School of Materials Science and Engineering Northeastern University 110819 Shenyang PR China)
Dr. Yuan Wang
(Institute for Frontier Materials Deakin University 3125 Melbourne Vic Australia)
Dr. Sufeng Cao
(Aramco Americas Boston Research Center 400 Technology Square 02139 Cambridge MA United States)
Dr. Lu Bai
(CAS Key Laboratory of Standardization and Measurement for Nanotechnology National Center for Nanoscience and Technology 100190 Beijing PR China)
Dr. Runguo Zheng
(School of Materials Science and Engineering Northeastern University 110819 Shenyang PR China)
Dr. Zhiyuan Wang
(School of Materials Science and Engineering Northeastern University 110819 Shenyang PR China)
Prof. Suresh K Bhargava
(Centre for Applied Materials and Industrial Chemistry (CAMIC) School of Science RMIT University 3000 Melbourne Vic Australia)
Prof. Hongyu Sun
(School of Resources and Materials Northeastern University at Qinhuangdao 066004 Qinhuangdao PR China)
Dr. Hamidreza Arandiyan
(Centre for Applied Materials and Industrial Chemistry (CAMIC) School of Science RMIT University 3000 Melbourne Vic Australia)
Prof. Yanguo Liu
(School of Materials Science and Engineering Northeastern University 110819 Shenyang PR China)
Abstract Transition metal oxide (TMO)‐based anodes attract much attention for lithium storage due to the merits of high theoretical capacity, facile synthesis, and easy scale‐up. Moreover, the increased working potential avoids the issue of lithium dendrites formation and thus improves battery safety. Herein, we propose a route to significantly improve the electrochemical performance of TMO anodes through configurational entropy optimization. For example, high‐entropy oxide (FeCoNiCrCu)3O4 is synthesized by carefully selecting metal elements. The (FeCoNiCrCu)3O4 electrode ensures not only low potential but also holds high capacity. In the half‐cell configuration, the (FeCoNiCrCu)3O4 electrode provides a specific capacity of 575.7 mAh g−1 after 200 cycles at 0.2 A g−1. More importantly, the electrode showed a relatively low discharge voltage of 0.39 V at 0.5 A g−1, which is caused by the configuration entropy optimization. The assembled (FeCoNiCrCu)3O4//LCO coin‐type full cell exhibits a high capacity of 266.3 mAh g−1 after 100 cycles at 0.2 A g−1 and an operating voltage up to 3.9 V.