Reinforcing electrochemical performance of Ni‐rich NCM cathode co‐modified by mg‐doping and Li3PO4‐coating

• Published in: International journal of energy research Vol. 46; no. 11; pp. 15244 - 15253
• Main Authors: Hwang, Do‐Young, Kang, Chea‐Yun, Yoon, Jung‐Rag, Lee, Seung‐Hwan
• Format: Journal Article
• Language: English
• Published: Chichester, UK John Wiley & Sons, Inc 01.09.2022; Hindawi Limited
• Subjects: advanced electrochemical performance; Batteries; Cathodes; combining advantages; Commercialization; Cycles; Doping; Electrochemical analysis; Electrochemistry; Electrode materials; Li3PO4 coating; LiNi0.8Co0.1Mn0.1O2 cathode materials; Lithium; Lithium-ion batteries; Magnesium phosphate; Marketing; mg doping
• ISSN: 0363-907X; 1099-114X
• DOI: 10.1002/er.8222

Summary The structural and interfacial degradation of Ni‐rich cathode materials during the cycling continuously delays its commercialization of lithium‐ion batteries (LIBs). To overcome these drawbacks, we propose a MgHPO4‐modified LiNi0.8Co0.1Mn0.1O2 (M‐NCM) cathode material. From electrochemical analysis, M‐NCM takes the combining advantages of Mg doping and Li3PO4 coating. Interestingly, M‐NCM shows a better discharge capacity of 203.5 mAh g−1, delivering outstanding initial coulombic efficiency of 86.1% compared to the pristine LiNi0.8Co0.1Mn0.1O2. Additionally, M‐NCM displays advanced cycle performance with a superior capacity retention of 81.1% after 100 cycles. Furthermore, M‐NCM effectively suppresses interfacial undesirable reactions at electrode/electrolyte interface during cycling. Consequentially, this study finds that MgHPO4 surface modification can bring enhanced electrochemical performance of Ni‐rich‐layered cathode materials for high‐energy and long‐term LIBs. The successfully modified NCM cathode using MgHPO4 is immune to severe intergranular cracking and pulverization of cathode particle. The combined effects of Mg doping and Li3PO4 coating could contribute to superior electrochemical properties as well as thermal stability.