Journal
NATIONAL SCIENCE REVIEW
Volume 8, Issue 6, Pages -Publisher
OXFORD UNIV PRESS
DOI: 10.1093/nsr/nwaa152
Keywords
mesoporous materials; boron doping; interconnected assembly; energy storage
Categories
Funding
- National Natural Science Foundation of China [51702046]
- Fok Ying-Tong Education Foundation of China [171041]
- Shanghai Scientific and Technological Innovation Project [19JC1410400, 18520750400]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
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A novel boron doping-induced interconnection-assembly approach was reported for fabricating mesoporous silicon oxycarbide nanospheres, featuring interconnected and strongly coupled nanospheres with coarse surfaces. The architecture offers tunable interconnection size, surface roughness, and switchable primary nanoparticles, demonstrating dual stable characteristics for long-term cycle life in lithium-ion battery anode applications.
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 of mesoporous 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.
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