High performance 0.9LiMnPO4-0.1LiFePO4/C composite  

作　　者：LIU Jian ZHANG XianHui YANG WenChao LIU Meng REN ZhongMin ZHANG ShengQi WANG DeYu 

机构地区：[1]Ningbo Institute of Material Technology&Engineering,Chinese Academy of Sciences,Ningbo 315201,China [2]Tianmu Lake Institute of Advanced Energy Storage Technology,Liyang 213300,China

出　　处：《Science China(Technological Sciences)》2020年第6期971-976,共6页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.51572273);the National Key R&D Program of China(Grant No.2018YFB0905400);the Ningbo S&T Innovation 2025 Major Special Programme(Grant No.2018B10061)。

摘　　要：The rate performance of lithium manganese phosphate is seriously tarnished by its sluggish surface kinetics,which could be addressed by LiFePO4-surface coating.For a higher energy output,here we explore thinner coating layers with 10%and 5%LiFePO4 via the lab-developed DMSO assisted method.The core-shell structured 0.9LiMnPO4-0.1LiFePO4/C maintains a high specific capacity,153,148 and 140 mA hg-1 under 0.1,1 and 5 C respectively,which are the best results for this composition till date.As for 0.95Li MnPO4-0.05 LiFePO4/C,the discharge capacity is lower than 110 mA hg-1 even in 0.1 C,which cannot meet the requirements of practical application.Our approaches push the manganese ratio of LiMnPO4-based composite to 90%from 80%,further improving the energy-density of the olivine phosphates.

关 键 词：lithium manganese phosphate core-shell structure cathode materials lithium ion battery 

分 类 号：TM912[电气工程—电力电子与电力传动]