Anions in the electrolyte are usually ignored in conventional"rocking-chair"batteries because only cationic de-/intercalation is considered.An ingenious scheme combining LiMn0.7Fe0.3PO4(LMFP@C)and graphite as a hybrid cathode for lithium-ion batteries(LIBs)is elaborately designed in order to exploit the potential value of anions for battery performance.The hybrid cathode has a higher conductivity and energy density than any of the individual components,allowing for the co-utilization of cations and an-ions through the de-/intercalation of Li+and PF6-over a wide voltage range.The optimal compound with a weight mix ratio of LMFP@C∶ graphite=5∶ 1 can deliver the highest specific capacity of nearly 140 mA h/g at 0.1 C and the highest voltage plateau of around 4.95 V by adjusting the appropriate mixing ratio.In addition,cyclic voltammetry was used to investigate the electrode kinetics of Li+and PF6-dif-fusion in the hybrid compound at various scan rates.In situ X-ray diffraction is also performed to further demonstrate the structural evolution of the hybrid cathode during the charge/discharge process.

Xiao-Tong Wang;Yang Yang;Jin-Zhi Guo;Zhen-Yi Gu;Edison Huixiang Ang;Zhong-Hui Sun;Wen-Hao Li;Hao-Jie Liang;Xing-Long Wu

MOE Key Laboratory for UV Light-Emitting Materials and Technology,Northeast Normal University,Changchun 130024,China;Faculty of Chemistry,Northeast Normal University,Changchun 130024,China;Natural Sciences and Science Education,National Institute of Education,Nanyang Technological University,Singapore 637616,Singapore;Center for Advanced Analytical Science,c/o School of Chemistry and Chemical Engineering,c/o MOE Key Laboratory for Water Quality and Conservation of the Pearl River Delta,Guangzhou University,Guangzhou 510006,China

材料科学技术（英文版）

[1]Xiao-Tong Wang;Yang Yang;Jin-Zhi Guo;Zhen-Yi Gu;Edison Huixiang Ang;Zhong-Hui Sun;Wen-Hao Li;Hao-Jie Liang;Xing-Long Wu-.An advanced cathode composite for co-utilization of cations and anions in lithium batteries)[J].材料科学技术（英文版）,2022(07):72-79

Anions,LMFP

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