Journal
ENERGY STORAGE MATERIALS
Volume 12, Issue -, Pages 54-60Publisher
ELSEVIER
DOI: 10.1016/j.ensm.2017.11.015
Keywords
Lithium-ion batteries; Ultrahigh loading anodes; Spherical Si/C granules; 3D conducting networks
Funding
- National Key R & D Program of China [2016YFA0202500, 2016YFB0100100]
- National Natural Science Foundation of China [51772301, 21773264]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA09010100]
- CAS
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The practical application of Si-based materials has long been impeded by the high-cost, complicated fabrication technology and poor electrochemical performance. Herein, Si/C granules with novel structure are optimally designed and synthesized via a facile and scalable fabrication process. The obtained Si/C anodes exhibit excellent electrochemical performance at high mass loading (8.5 mg cm(-2)) because of the 3D conducting network and high tap density. Moreover, the cycling performance of Si/C anodes still remains stable even when the calendered density is increased to the level of commercial graphite anodes (1.6 g cm(-3)). Furthermore, Si/C anodes with various reversible capacities (450-750 mA h g(-1)) could be fabricated by the flexible production process. The pouch cell using Si/C anode and LiNi0.5Co0.3Mn0.2O2 cathode successfully demonstrates the practicability of Si/C anodes by powering electronic devices. The superior properties of full cell indicate that the spherical Si/C granules are an attractive alternative toward the practical application in Li-ion batteries.
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