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Surface Modification of Li‐Rich Mn‐Based Layered Oxide Cathodes: Challenges, Materials, Methods, and Characterization
Author(s) -
Lei Yike,
Ni Jie,
Hu Zijun,
Wang Ziming,
Gui Fukang,
Li Bing,
Ming Pingwen,
Zhang Cunman,
Elias Yuval,
Aurbach Doron,
Xiao Qiangfeng
Publication year - 2020
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.202002506
Subject(s) - materials science , surface modification , cathode , characterization (materials science) , lithium (medication) , commercialization , nanotechnology , energy storage , electrochemistry , battery (electricity) , atomic layer deposition , surface engineering , oxide , engineering physics , chemical engineering , electrode , electrical engineering , layer (electronics) , power (physics) , metallurgy , medicine , chemistry , physics , quantum mechanics , endocrinology , political science , law , engineering
Abstract Rechargeable lithium‐ion batteries have become the dominant power sources for portable electronic devices, and are regarded as the battery technology of choice for electric vehicles and as potential candidates for grid‐scale storage. Commercial lithium‐ion batteries, after three decades of cell engineering, are approaching their energy density limits. Toward continually improving the energy density and reducing cost, Li‐rich Mn‐based layered oxide (LMLO) cathodes are receiving more and more attention due to their high discharge capacity and low cost. However, commercialization has been hampered by severe capacity and voltage decay, sluggish rate capability, and poor safety performance during charge/discharge cycles. Surface modification has effectively adopted to improve the electrochemical performance of LMLO cathodes. In this review, the main problems and recent progress in the field are summarized, focusing on challenges, materials, methods, and characterization techniques. More effective surface modification can be accomplished by strengthening nondestructive in situ measurements, expanding atomic/molecular layer (ALD/MLD) deposition techniques, and adopting fluorinated cosolvents.