Boron doping-induced interconnected assembly approach for mesoporous silicon oxycarbide architecture

• 作者: Guanjia Zhu Rui Guo Wei Luo Hua Kun Liu Wan Jiang Shi Xue Dou Jianping Yang
• 来源期刊: 国家科学评论（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: RESEARCH ARTICLES
• 页码范围: 163-173
• 页数: 11页
• 语种: 英文
• DOI: 10.1093/nsr/nwaa152

摘要

Despite desirable progress in various assembly tactics,the main drawback associated with current assemblies is the weak interparticle connections limited by their assembling protocols.Herein,we report a novel boron doping-induced interconnection-assembly approach for fabricating an unprecedented assembly ofmesoporous silicon oxycarbide nanospheres,which are derived from periodic mesoporous organosilicas.The as-prepared architecture is composed of interconnected,strongly coupled nanospheres with coarse surfaces.Significantly,through delicate analysis of the as-formed boron doped species,a novel melt-etching and nucleation-growth mechanism is proposed,which offers a new horizon for the developing interconnected assembling technique.Furthermore,such unique strategy shows precise controllability and versatility,endowing the architecture with tunable interconnection size,surface roughness and switchable primary nanoparticles.Impressively,this interconnected assembly along with tunable surface roughness enables intrinsically dual (both structural and interfacial) stable characteristics,achieving extraordinary long-term cycle life when used as a lithium-ion battery anode.