Anisotropic alignments of hierarchical Li2SiO3/TiO2 @nano-C anode//LiMnPO4@nano-C cathode architectures for full-cell lithium-ion battery

• 来源期刊: 国家科学评论（英文版）
• 关键词: lithium-ion batteries micro nano architectures LiMnPO4@nano-carbon cathode Li2SiO3/TiO2@nano-carbon anode LIB-CR2032 coin cell models
• 年，卷（期）: 2020,（5）
• 页码范围: 863-880
• 页数: 18页
• 语种: 英文
• DOI: 10.1093/nsr/nwaa017

摘要

We report on low-cost fabrication and high-energy density of full-cell lithium-ion battery (LIB) models.Super-hierarchical electrode architectures of Li2SiO3/TiO2@nano-carbon anode (LSO.TO@nano-C) and high-voltage olivine LiMnPO4@nano-carbon cathode (LMPO@nano-C) are designed for half-and full-system LIB-CR2032 coin cell models.On the basis of primary architecture-power-driven LIB geometrics,the structure keys including three-dimensional (3D) modeling superhierarchy,multiscale micro/nano architectures and anisotropic surface heterogeneity affect the buildup design of anode/cathode LIB electrodes.Such hierarchical electrode surface topologies enable continuous in-/out-flow rates and fast transport pathways of Li+-ions during charge/discharge cycles.The stacked layer configurations of pouch LIB-types lead to excellent charge/discharge rate,and energy density of 237.6 Wh kg-1.As the most promising LIB-configurations,the high specific energy density of hierarchical pouch battery systems may improve energy storage for long-driving range of electric vehicles.Indeed,the anisotropic alignments of hierarchical electrode architectures in the large-scale LIBs provide proof of excellent capacity storage and outstanding durability and cyclability.The full-system LIB-CR2032 coin cell models maintain high specific capacity of～89.8％ within a long-term life period of 2000 cycles,and average Coulombic efficiency of 99.8％ at 1C rate for future configuration of LIB manufacturing and commercialization challenges.