Precise Surface Engineering of Cathode Materials for Improved Stability of Lithium‐Ion Batteries. Issue 32 (17th April 2019)

• Record Type: Journal Article
• Authors: Liu, Yuan; Lin, Xi‐Jie; Sun, Yong‐Gang; Xu, Yan‐Song; Chang, Bao‐Bao; Liu, Chun‐Tai; Cao, An‐Min; Wan, Li‐Jun
• Is Part Of: Small. Volume 15:Issue 32(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-04-17
• Subjects: cathode materials -- stability -- surface doping -- surface modification -- uniform coating; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201901019
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: As lithium‐ion batteries continue to climb to even higher energy density, they meanwhile cause serious concerns on their stability and reliability during operation. To make sure the electrode materials, particularly cathode materials, are stable upon extended cycles, surface modification becomes indispensable to minimize the undesirable side reaction at the electrolyte–cathode interface, which is known as a critical factor to jeopardizing the electrode performance. This Review is targeted at a precise surface control of cathode materials with focus on the synthetic strategies suitable for a maximized surface protection ensured by a uniform and conformal surface coating. Detailed discussions are taken on the formation mechanism of the designated surface species achieved by either wet‐chemistry routes or instrumental ones, with attention to the optimized electrochemical performance as a result of the surface control, accordingly drawing a clear image to describe the synthesis–structure–performance relationship to facilitate further understanding of functional electrode materials. Finally, perspectives regarding the most promising and/or most urgent developments for the surface control of high‐energy cathode materials are provided. Abstract : Surface modification of cathode materials is indispensable to stabilize the cathode–electrolyte interface. The synthesis strategies suited for the creation of a uniform shell with thickness controlled at nanometer accuracy are introduced, with the corresponding formation mechanisms discussed in detail, in order to present the synthesis–structure–performance relationship to facilitate understanding of the stability of high‐energy electrode materials.