Journal
CHEMICAL COMMUNICATIONS
Volume 55, Issue 71, Pages 10531-10534Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9cc05515k
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Funding
- National Natural Science Foundation of China [51702046]
- Shanghai Committee of Science and Technology, China [17ZR1401000]
- Shanghai Pujiang Program [17PJ1400100]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University
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The void space is widely used in anode materials for relieving the volume expansion during lithium insertion and extraction processes. Generally, the void is randomly generated or exceeded the expansion to ensure the structural stability, which thus sacrifices the capacity and energy density. In this research, a core-satellite architecture was constructed with an elaborate structural design to obtain a rational balance of the void space and capacity. Such well fabricated silicon@porous silicon@carbon (Si@pSi@C) core-satellite nanoparticles with a precise void space present a satisfactory capacity of 1002 mA h g(-1) over 100 cycles at a current of 100 mA g(-1). This delicate core-satellite architecture could promote the use of the structural design in high-energy density lithium-ion batteries.
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