Element‐Engineered Lithium Borate for High‐Efficiency Prelithiation in Silicon‐Based Lithium‐Ion Batteries
Abstract
Abstract Enhancing the energy density of lithium‐ion batteries (LIBs) remains a critical challenge for advancing next‐generation energy storage technologies. Silicon‐based anodes offer significantly higher theoretical capacitites, but their practical application is hindered by low initial coulombic efficiency (ICE), leading to substantial lithium loss and rapid full cell performance degradation. Herein, a novel prelithiation agent, lithium borate (LBO), based on the ultralight, cost‐effective, and d‐orbital‐free non‐metallic element boron (B) is presented. LBO features a core–shell architecture, consisting of a crystalline Li 3 BO 3 core encapsulated by Li 2 CO 3 and amorphous carbon, delivering an exceptional initial charge capacity of 692 mAh g −1 and superior atmospheric stability with 70% capacity retention after 8 days of ambient exposure. When applied in SiO x ||LRLO (Li‐rich layered oxide) pouch cells, LBO enhances the gravimetric and volumetric energy density by 14.7% and 21.8%, respectively, while effectively suppressing the irreversible LRLO degradation caused by Li deficiency. This work introduces an element‐centric design methodology for prelithiation agents, providing a promising route to propel the development of high‐energy‐density LIBs.
Article Details
Authors (8)
Chao‐Fan Gu
CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular Sciences Beijing National Laboratory for Molecular Sciences (BNLMS) Institute of Chemistry Chinese Academy of Sciences (CAS) Beijing 100190 P. R. China
Xin Chang
School of Chemical Engineering and Technology, Key Laboratory for Green Chemical Technology of Ministry of Education, Tianjin University
Shuhao Xiao
CAS Key Laboratory of Molecular Nanostructure and Nanotechnology Beijing National Laboratory For Molecular Sciences (BNLMS) Institute of Chemistry Chinese Academy of Sciences (CAS) Beijing P. R. China
Zi‐Yi Zhou
CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular Sciences Beijing National Laboratory for Molecular Sciences (BNLMS) Institute of Chemistry Chinese Academy of Sciences (CAS) Beijing 100190 P. R. China
Chen Li
Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, USA.
Boheng Yuan
CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS research/Education Center for Excel-Lence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS)
Qinghai Meng
CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS research/Education Center for Excel-Lence in Molecular Sciences, Beijing National Laboratory for Molecular Sciences (BNLMS)
Yu‐Guo Guo
CAS Key Laboratory of Molecular Nanostructure and Nanotechnology Beijing National Laboratory For Molecular Sciences (BNLMS) Institute of Chemistry Chinese Academy of Sciences (CAS) Beijing P. R. China