A General One‐Pot Synthesis Strategy of 3D Porous Hierarchical Networks Crosslinked by Monolayered Nanoparticles Interconnected Nanoplates for Lithium Ion Batteries. (20th June 2019)

• Record Type: Journal Article
• Authors: Tan, Xinghua; Guo, Limin; Liu, Shengnan; Wu, Jianxin; Zhao, Tingqiao; Ren, Juncong; Liu, Yanlin; Kang, Xiaohong; Wang, Hanfu; Sun, Lianfeng; Chu, Weiguo
• Is Part Of: Advanced functional materials. Volume 29:Number 34(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-06-20
• Subjects: 3D porous hierarchical networks -- expanded graphites -- general one‐pot mass production -- lithium ion batteries -- superior performance; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.201903003
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: A structure of 3D porous hierarchical networks is highly desired for mass production of electrode materials for lithium‐ion batteries due to its unique role in promoting battery performance. Herein, a general strategy using expanded graphites as both a structure‐directed template and a solution container is proposed for the synthesis of various cathode materials with 3D porous hierarchical networks formed by the crosslinkage of monolayered primary nanoparticles interconnected nanoplates, which all show high capacity, superior cyclic performance, and rate capability. The LiNi0.8 Co0.15 Al0.05 O2 /Li half cell delivers a capacity of 118 mAh g −1 at 20 C (5.6 A g −1 ) and capacity retention of 71.6% after 1000 cycles at 1 C, while the LiNi0.8 Co0.15 Al0.05 O2 /graphite full cell shows 79.9% and 80.0% capacity retentions after 1400 cycles at 1 C and 3000 cycles at 5 C, respectively. The superior performance is attributed to the unique 3D porous hierarchical networks with a stable surface and structure, which is related to the sufficient oxidization of Ni 2+ and the formation of little residual lithium at surface intrinsic to this strategy. The study opens a generalized new avenue for facile, cheap, green, and mass production of various oxide materials with 3D porous hierarchical networks. Abstract : A facile one‐pot strategy for upscalable synthesis of cathode materials with 3D porous hierarchical network structures is proposed, by utilizing cheap expanded graphites as both a structure‐directed template and a solution container. The unique 3D porous network structure with the highly stable surface and structure thus obtains accounts for the excellent performance for all cathode materials for lithium ion batteries.