Journal
ACS APPLIED ENERGY MATERIALS
Volume 2, Issue 7, Pages 5171-5182Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.9b00848
Keywords
lithium ion battery; tin dioxide; negative electrode; carbon nanocomposite; low temperature
Funding
- International Cooperation Project of Sichuan Provincial Department of Science and Technology [2017HH0067, 2017HH0101]
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Alloying negative electrodes possessing higher capacity and rate performance stand at the leading edge of pursuing faster and highly reversible lithium storage. However, the commercialization of alloying materials for lithium ion batteries (LIBs) is still limited by unmanageable volume expansion, causing rapid capacity decay and complex production processes that are difficult to scale up. Here we report a tin dioxide/carbon (SnO2/C) nanocomposite negative electrode with high rate capacity and cycle performance produced by a simple, energy-saving, and high-yield preparation technology. By a tailored air sintering atmosphere and low sintering temperature of 300 degrees C, the specially designed SnO2/C nanocomposite with porous carbon layer and oxygen-rich functional group was prepared successfully. The electrochemical tests exhibit enhanced capacities of 1074 mAh/g at 0.1 A/g and 459 mAh/g at 12.8 A/g, retaining 656 mAh/g at 1 A/g after 400 cycles. The following full battery testing at the voltage of 4.3 V also demonstrates its practicality. Considering the cost effectivity and resource sustainability, this work may give some inspiration for the next-generation high-performance LIBs.
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