Premium
Horizons for Li‐Ion Batteries Relevant to Electro‐Mobility: High‐Specific‐Energy Cathodes and Chemically Active Separators
Author(s) -
Susai Francis Amalraj,
Sclar Hadar,
Shilina Yuliya,
Penki Tirupathi Rao,
Raman Ravikumar,
Maddukuri Satyanarayana,
Maiti Sandipan,
Halalay Ion C.,
Luski Shalom,
Markovsky Boris,
Aurbach Doron
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201801348
Subject(s) - materials science , cathode , battery (electricity) , degradation (telecommunications) , ion , energy storage , doping , nanotechnology , energy density , chemical engineering , engineering physics , optoelectronics , computer science , electrical engineering , chemistry , organic chemistry , power (physics) , physics , quantum mechanics , engineering , telecommunications
Li‐ion batteries (LIBs) today face the challenge of application in electrified vehicles (xEVs) which require increased energy density, improved abuse tolerance, prolonged life, and low cost. LIB technology can significantly advance through more realistic approaches such as: i) stable high‐specific‐energy cathodes based on Li 1+ x Ni y Co z Mn w O 2 (NCM) compounds with either Ni‐rich ( x = 0, y → 1), or Li‐ and Mn‐rich (0.1 < x < 0.2, w > 0.5) compositions, and ii) chemically active separators and binders that mitigate battery performance degradation. While the stability of such cathode materials during cell operation tends to decrease with increasing specific capacity, active material doping and coatings, together with carefully designed cell‐formation protocols, can enable both high specific capacities and good long‐term stability. It has also been shown that major LIB capacity fading mechanisms can be reduced by multifunctional separators and binders that trap transition metal ions and/or scavenge acid species. Here, recent progress on improving Ni‐rich and Mn‐rich NCM cathode materials is reviewed, as well as in the search for inexpensive, multifunctional, chemically active separators. A realistic overview regarding some of the most promising approaches to improving the performance of rechargeable batteries for xEV applications is also presented.