文献类型：期刊文献

英文题名：Architecture and performance of anion-doped Co-free lithium-rich cathode material with nano-micron combined morphology

作者：Wu, Chao[1];Cao, Shuang[1];Xie, Xin[1];Guo, Changmeng[1];Li, Heng[1];Li, Zhi[1];Zang, Zihao[1];Chang, Baobao[2];Chen, Gairong[3];Guo, Xiaowei[3];Wu, Tianjing[1];Wang, Xianyou[1]

第一作者：Wu, Chao

通讯作者：Wu, TJ[1];Wang, XY[1]

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

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

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

年份：2022

卷号：429

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20213610874967);Scopus(收录号：2-s2.0-85114355854);WOS:【SCI-EXPANDED(收录号:WOS:000727803000006)】；

基金：This work was supported financially by the Science and Technology Innovative Program of Hunan Province (No.2020RC2075) , Key Project of Strategic New Industry of Hunan Province (No.2019GK2032) , Na-tional Natural Science Foundation of China (No.52003230) , and the National Natural Science Foundation of China (No.U19A2018) . The authors would like to thank XiaoBin Zhou from Shiyanjia Lab ( www.shiyanjia.com ) for the TEM test and XPS test.

语种：英文

外文关键词：Oxalate co-precipitation route; Co-free lithium-rich cathode material; Jahn-Teller effect; Fluorine doping; Lithium ion battery

摘要：Co-free cathode materials are gradually attracted wide attention due to the low budget and environmental friendliness, but their application is still prevented by the poor rate performance and cyclic stability. Herein, the Co-free lithium-rich cathode materials (Li1.2Ni0.2Mn0.6O2, LRNMO) with a nano-micron combined morphology is prepared by a simple oxalate co-precipitation route and further modified by an anion doping strategy. It has been found that the F- anion doping can increase the content of Mn4+ in LRNMO, reduce the influence of the Jahn-Teller effect, and further impede the transition from layered phase to spinel phase. As a result, the as-obtained Li1.2Ni0.2Mn0.6O2-xFx (x = 0.04, named as F4-LRNMO) shows an optimal electrochemical performance, for instance, high discharge capacity (243 mAh g(-1)) with a satisfactory initial coulombic efficiency of 84.37% at 0.1C. Meanwhile, the F4-LRNMO sample also can display high capacity retention of 92.2% after 200 cycles at 1C, and a remarkably high discharge capacity of 151 mAh g(-1) with capacity retention of 95.4% after 100 cycles even at high rate of 5C. In consequence, this work can not only ameliorate the defects of poor stability and low initial coulomb efficiency, but also offer a meaningful exploration for the development of Co-free lithium-rich cathode materials with high capacity and high performance-price ratio.