Horizons for Li-Ion Batteries Relevant to Electro-Mobility: High-Specific-Energy Cathodes and Chemically Active Separators

Advanced Materials
Francis Amalraj SusaiDoron Aurbach

Abstract

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 Li1+x Niy Coz Mnw O2 (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 mo...Continue Reading

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Citations

May 31, 2019·Physical Chemistry Chemical Physics : PCCP·Yongseon Kim
Jan 23, 2020·Materials·Eléonore Lagae-CapelleDaniel Meyer
Mar 7, 2020·Chemical Reviews·Won-Jin KwakDoron Aurbach
May 28, 2020·ACS Applied Materials & Interfaces·Xiaoqiang TianYong Qin
Jul 13, 2019·ACS Applied Materials & Interfaces·Guruprakash Karkera, Annigere S Prakash

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