Nanostructured Hybrid Silicon/Carbon Nanotube Heterostructures: Reversible High-Capacity Lithium-Ion Anodes

Recent advancements using carbon nanotube electrodes show the ability for multifunctionality as a lithium-ion storage material and as an electrically conductive support for other high capacity materials like silicon or germanium. Experimental data show that replacement of conventional anode designs, which use graphite composites coated on copper foil, with a freestanding silicon-single-walled carbon nanotube (SWCNT) anode, can increase the usable anode capacity by up to 20 times. In this work, a series of calculations were performed to elucidate the relative improvement in battery energy density for such anodes paired with conventional LiCoO2, LiFePO4, and LiNiCoAlO2 cathodes. Results for theoretical flat plate prismatic batteries comprising freestanding silicon-SWCNT anodes with conventional cathodes show energy densities of 275 Wh/kg and 600 Wh/L to be theoretically achievable; this is a 50% improvement over today's commercial cells.

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Tailoring the interfaces of silicon/carbon nanotube for high rate lithium-ion battery anodes

Journal of Power Sources ◽

10.1016/j.jpowsour.2019.227593 ◽

2020 ◽

Vol 450 ◽

pp. 227593 ◽

Cited By ~ 5

Author(s):

Ziqi Zhang ◽

Xiang Han ◽

Lianchuan Li ◽

Pengfei Su ◽

Wei Huang ◽

...

Keyword(s):

Carbon Nanotube ◽

Lithium Ion Battery ◽

Lithium Ion ◽

High Rate ◽

Silicon Carbon

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Solutions for the problems of silicon–carbon anode materials for lithium-ion batteries

Royal Society Open Science ◽

10.1098/rsos.172370 ◽

2018 ◽

Vol 5 (6) ◽

pp. 172370 ◽

Cited By ~ 16

Author(s):

Xuyan Liu ◽

Xinjie Zhu ◽

Deng Pan

Keyword(s):

Lithium Ion Batteries ◽

Anode Materials ◽

High Capacity ◽

Lithium Ion ◽

Cycling Performance ◽

Carbon Anode ◽

Environmental Friendliness ◽

Silicon Carbon ◽

New Energy ◽

Carbon Anodes

Lithium-ion batteries are widely used in various industries, such as portable electronic devices, mobile phones, new energy car batteries, etc., and show great potential for more demanding applications like electric vehicles. Among advanced anode materials applied to lithium-ion batteries, silicon–carbon anodes have been explored extensively due to their high capacity, good operation potential, environmental friendliness and high abundance. Silicon–carbon anodes have demonstrated great potential as an anode material for lithium-ion batteries because they have perfectly improved the problems that existed in silicon anodes, such as the particle pulverization, shedding and failures of electrochemical performance during lithiation and delithiation. However, there are still some problems, such as low first discharge efficiency, poor conductivity and poor cycling performance, which need to be improved. This paper mainly presents some methods for solving the existing problems of silicon–carbon anode materials through different perspectives.

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