Horizons for Li‐Ion Batteries Relevant to Electro‐Mobility: High‐Specific‐Energy Cathodes and Chemically Active Separators. Issue 41 (17th July 2018)

• Record Type: Journal Article
• Authors: 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
• Is Part Of: Advanced materials. Volume 30:Issue 41(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-07-17
• Subjects: chemically active separators -- high‐capacity Li -- high‐capacity Ni‐rich oxide cathodes -- Li‐ion batteries -- Mn dissolution -- Mn‐rich oxide cathodes; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201801348
• Languages: English
• ISSNs: 0935-9648

Abstract

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 Ni y Co z Mn w 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 most promising approaches to improving the performance of rechargeable batteries for xEV applications is also presented. Abstract : Promising Ni‐rich and Li, Mn‐rich cathode materials, multifunctional separators and polymeric binders for advanced lithium‐ion batteries (LIBs) are reviewed and discussed. The emphasis is on strategies of cation or anion doping and thin coatings to improve structural characteristics and electrochemical behavior of these materials. Attention is paid to pointing out the true horizons for LIBs that can advance the electro‐mobility revolution.