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Exploring Lithium Deficiency in Layered Oxide Cathode for Li‐Ion Battery
Author(s) -
Cho SungJin,
Uddin MdJamal,
Alaboina Pankaj K.,
Han Sang Sub,
Nandasiri Manjula I.,
Choi Yong Seok,
Hu Enyuan,
Nam KyungWan,
Schwarz Ashleigh M.,
Nune Satish K.,
Cho Jong Soo,
Oh Kyu Hwan,
Choi Daiwon
Publication year - 2017
Publication title -
advanced sustainable systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.499
H-Index - 24
ISSN - 2366-7486
DOI - 10.1002/adsu.201700026
Subject(s) - cathode , electrolyte , lithium (medication) , materials science , spinel , battery (electricity) , oxide , capacity loss , lithium hydroxide , chemical engineering , ion , chemistry , electrode , power (physics) , metallurgy , ion exchange , medicine , physics , organic chemistry , quantum mechanics , engineering , endocrinology
The ever‐growing demand for high capacity cathode materials is on the rise since the futuristic applications are knocking on the door. Conventional approach to developing such cathode relies on the lithium‐excess materials to operate the cathode at high voltage and extract more lithium‐ion. Yet, they fail to satiate the needs because of their unresolved issues upon cycling such as, for lithium manganese‐rich layered oxides—their voltage fading, and for as nickel‐based layered oxides—the structural transition. Here, in contrast, lithium‐deficient ratio is demonstrated as a new approach to attain high capacity at high voltage for layered oxide cathodes. Rapid and cost effective lithiation of a porous hydroxide precursor with lithium deficient ratio is acted as a driving force to partially convert the layered material to spinel phase yielding in a multiphase structure (MPS) cathode material. Upon cycling, MPS reveals structural stability at high voltage and high temperature and results in fast lithium‐ion diffusion by providing a distinctive solid electrolyte interface (SEI) chemistry—MPS displays minimum lithium loss in SEI and forms a thinner SEI. MPS thus offers high energy and high power applications and provides a new perspective compared to the conventional layered cathode materials denying the focus for lithium excess material.