期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 534, 期 -, 页码 47-54出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.09.004
关键词
Si nanoparticle; Mesoporous shell carbon; Li ion battery; Anode; High capacity
资金
- Global Frontier R&D Program on Centre for Multiscale Energy System - Ministry of Education, Science and Technology [NRF-2011-0031571]
- 2016 DGIST-GIST cooperation fund
An innovative and simple synthesis strategy of silicon nanoparticle (Si NP) core covered by mesoporous shell carbon (MSC) structure is demonstrated. The Si core@MSC (SCMSC) composite is developed for addressing the issues for Si anode material in lithium ion batteries (LIBs) such as high volume expansion and low electrical conductivity. Significant improvement in the electrochemical performance for the SCMSC anode is observed compared with bare Si anode. The SCMSC composite delivers an initial specific capacity of 2450 mAh g(-1) at 0.166 A g(-1) with Coulombic efficiency of 99.2% for 100 cycles. Compared to bare Si anode, the SCMSC anode exhibits much higher Li storage capacity, superior cyclability, and good rate capability, highlighting the advantages of hierarchical MSC in the SCMSC structure. (C) 2018 Elsevier Inc. All rights reserved.
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