维普中文期刊产品整合服务

One-time sintering process to modify xLi2MnO3(1-x)LiMO2 hollow architecture and studying their enhanced electrochemical performances

查看全文 作　　者：Renheng [1]Wang;Yiling [1]Sun;Kaishuai [1]Yang;Junchao [2]Zheng;Yan [1]Li;Zhengfang [1]Qian;Zhenjiang [2,4]He;Shengkui [3]Zhong 高影响力作者 机构地区：[1]College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,Guangdong,China;[2]School of Metallurgy and Environment,Central South University,Changsha 410083,Hunan,China;[3]School of Marine Science and Technology,Hainan Tropical Ocean University,Sanya 572000,Hainan,China;[4]College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China高影响力机构 出　　处：《Journal of Energy Chemistry》索引2020年第29卷第11期,共9页高影响力期刊 基　　金：the financial support by the Natural Science Foundation of Guangdong Province(2019A1515012111);the National Natural Science Foundation of China(51804199 and 51604081);the Science and Technology Innovation Commission of Shenzhen(JCYJ20190808173815205 and 20180123);the Shenzhen Science and Technology Program(KQTD20180412181422399);“Chenguang Program”supported by Shanghai Education Development Foundation and Shanghai Municipal Education Commission(16CG40)。 摘　　要：To solve the critical problems of lithium rich cathode materials, e.g., structure instability and short cycle life, we have successfully prepared a ZrO2-coated and Zr-doping xLi2MnO3·(1–x)LiMO2 hollow architecture via one-time sintering process. The modified structural materials as lithium-ion cathodes present good structural stability and superior cycle performance in LIBs. The discharge capacity of the ZrO2-coated and Zr-doped hollow pristine is 220 mAh g-1 at the 20th cycle at 0.2 C(discharge capacity loss, 2.7%)and 150 m Ah g-1 at the 100 th cycle at 1 C(discharge capacity loss, 17.7%), respectively. However, hollow pristine electrode only delivers 203 m Ah g-1 at the 20 th cycle at 0.2 C and 124 mAh g-1 at the 100 th cycle at 1 C, respectively, and the corresponding to capacity retention is 92.2% and 72.8%, respectively.Diffusion coefficients of modified hollow pristine electrode are much higher than that of hollow pristine electrode after 100 cycles(approach to 1.4 times). In addition, we simulate the adsorption reaction of HF on the surface of ZrO2-coated layer by the first-principles theory. The calculations prove that the adsorption energy of HF on the surface of ZrO2-coated layer is about-1.699 e V, and the ZrO2-coated layer could protect the hollow spherical xLi2MnO3·(1–x)LiMO2 from erosion by HF. Our results would be applicable for systematic amelioration of high-performance lithium rich material for anode with the respect of practical application. 关 键 词：Lithium rich cathode materials One-time sintering process Coated and doped Electrochemical performances First-principles calculations
相关文献

参考文献(45)

引证文献(3)

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1　渝公网安备 50019002500403号　违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费