Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 43, Pages 49080-49089Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c14157
Keywords
lithium-ion battery; silicon anode; nanosilver particles; porous silicon; metallurgical-grade silicon
Funding
- National Key R&D Program of China [2018YFC1901805, 2018YFC1901801]
- National Natural Science Foundation of China [51762043, 51904134, 51974143, 61764009]
- Program for Innovative Research Team in University of Ministry of Education of China [IRT_17R48]
- Major Science and Technology Projects in Yunnan Province [2019ZE007]
- Key Project of Yunnan Province Natural Science Fund [2018FA027]
- Yunnan Ten Thousand Talents Plan Young & Elite Talents Project
- Chinese Scholarship Council
- Australian Research Council
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Silicon (Si) has been considered as one of the most promising candidates for the next-generation lithium-ion battery (LIB) anode materials owing to its huge theoretical specific capacity of 4200 mA h g(-1). However, the practical application of Si anodes in commercial LIBs is facing challenges because of the lack of scalable and cost-effective methods to prepare Si-based anode materials with proper microstructure and competitive electrochemical performances. Herein, we report a facile and scalable method to produce multidimensional porous silicon embedded with a nanosilver particle (pSi/Ag) composite from commercially available low-cost metallurgical-grade silicon (MG-Si) powder. The unique hybrid structure contributes to fast electronic transport and relieves volume change of silicon during the charge-discharge process. The pSi/Ag composite exhibits a large initial discharge capacity (3095 mA h g(-1) at a high current of 1 A g(-1)), an excellent cycling performance (1930 mA h g-1 at 1 A g-1 after 50 cycles), and outstanding rate capacities (up to 1778 mA h g(-1) at a higher current of 2 A g(-1)). After the samples are modified by reduced graphene oxide, the capacities of the pSi/Ag@RGO composite electrode can still be maintained over 1000 mA h g(-1) after 200 cycles. This study provides a simple and effective strategy for production of high-performance anode materials.
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