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Minerals 2018, 8(5), 180; https://doi.org/10.3390/min8050180

Fabrication of Si Nanoparticles@Carbon Fibers Composites from Natural Nanoclay as an Advanced Lithium-Ion Battery Flexible Anode

1
Centre for Mineral Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
2
Hunan Key Lab of Mineral Materials and Application, Central South University, Changsha 410083, China
3
School of Materials Science and Engineering, Central South University, Changsha 410083, China
4
Key Lab of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Central South University, Changsha 410083, China
*
Authors to whom correspondence should be addressed.
Received: 20 March 2018 / Revised: 22 April 2018 / Accepted: 24 April 2018 / Published: 27 April 2018
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Abstract

In this paper, a cost-effective strategy for fabricating silicon-carbon composites was designed to further improve the electrochemical performance and commercialization prospects of Si anodes for lithium-ion batteries (LIBs). Silicon-carbon fibers (CFs) were prepared by loading Si nanoparticles (SiNPs) on interconnected carbon fibers via an electrospinning technique (SiNPs@CFs). The Si nanoparticles were obtained by the reduction reaction of natural clay minerals. As a flexible anode for LIBs, the SiNPs@CFs anode demonstrated a reversible capacity of 1238.1 mAh·g−1 and a capacity retention of 77% after 300 cycles (in contrast to the second cycle) at a current density of 0.5 A·g−1. With a higher current density of 5.0 A·g−1, the electrode showed a specific capacity of 528.3 mAh·g−1 after 1000 cycles and exhibited a superior rate capability compared to Si nanoparticles. The excellent electrochemical properties were attributed to the construction of flexible electrodes and the composite comprising carbon fibers, which lessened the volume expansion and improved the conductivity of the system. View Full-Text
Keywords: halloysite; silicon; flexible anode; lithium-ion battery halloysite; silicon; flexible anode; lithium-ion battery
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Liu, S.; Zhang, Q.; Yang, H.; Mu, D.; Pan, A.; Liang, S. Fabrication of Si Nanoparticles@Carbon Fibers Composites from Natural Nanoclay as an Advanced Lithium-Ion Battery Flexible Anode. Minerals 2018, 8, 180.

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