摘要
Due to the low cost,high working voltage and high storage capacity,Li-rich Mn-based layered compounds show promise as the cathode materials for lithiumion batteries(LIBs).However,the side reactions at the solid-liquid interface of the cathode will lead to rapid capacity decay and inferior rate performance.Herein,this article proposes a liquid-phase dispersion strategy to introduce a Na_(2)WO_(4)layer on the Li_(1.2)Ni_(0.13)-Co_(0.13)Mn_(0.54)O_(2) cathode,which can reduce the side effects between raw materials and electrolyte and promote the insertion/extraction rate of Li^(+),thus enhancing the material stability and rate performance.As a result,the capacity retention rate is 96.9%after 200 cycles under 2C.Moreover,the capacities are 177.5,149.5,111.1 and58.3 mAh·g^(-1)at 1C,2C,5C and 10C,implying a superior fast charging performance.The exceptional performance can be ascribed to both the increased conductivity and enhanced structural stability of the cathode material.What's more,based on the investigation of ion insertion/extraction behavior in electrode materials and the ion migration kinetics in the electrolyte,this study suggests that coating Li-rich Mn-based materials with Na_(2)WO_(4)can be a promising strategy to improve their performance in LIBs.
出处
《Rare Metals》
SCIE
EI
CAS
CSCD
2024年第8期3647-3660,共14页
稀有金属（英文版）
基金
financially supported by the National Natural Science Foundation of China(No.52374301)
the Natural Science Foundation of Hebei Province(No.E2022501014)
the Science and Technology Research Youth Fund Project of Higher Education Institutions of Hebei Province(No.QN2022196)
the Fundamental Research Funds for the Central Universities(No.N2123001)
the Natural Science Foundation of Hebei Province of China(No.B2020501003)。
