Facile preparation of silicon/carbon composite with porous architecture for advanced lithium-ion battery anode
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Article number | 117427 |
Journal / Publication | Journal of Electroanalytical Chemistry |
Volume | 937 |
Online published | 6 Apr 2023 |
Publication status | Published - 15 May 2023 |
Link(s)
Abstract
Silicon is a potential anode material for Li battery due to its high theoretical specific capacity (4200 mAh g−1). However, Si is hampered for practical application in Li-battery due to its enormous volume alternation causing instability. Herein, we demonstrated a novel carbon-coated porous structure (C@void/Si-G) synthesized by uniformly wrapping Si into pitch pyrolytic carbon shells and then in-situ removing the sodium chloride template can overcome the bottleneck. It is worth noting that our process for C@void/Si-G also offers a simple route for cost down and mass production of anode material. The C@void/Si-G anodes exhibit an excellent capacity of 1082.7 mAh g−1 at 0.2 C after 200 cycles. Furthermore, it holds a high capacity retention of 81.9 % after 500 cycles at 0.5 C. We found that C@void/Si-G composite only rises about 41% volumetric expansion during 500 operation cycles. This can effectively avoid direct contact between silicon and electrolyte to form a stable solid electrolyte interphase (SEI) film. Especially, practical application of the C@void/Si-G anode is demonstrated in a full cell pairing with LiNi0.3Co0.3Mn0.3O2 cathode. The full cell presents great cycle retention of 90.1 % at 0.2 C after 100 cycles and a high energy density (446 Wh kg−1). © 2023 Elsevier B.V.
Research Area(s)
- Ball milling, Carbon, Lithium-ion batteries, Porous structure, Silicon-based anode
Citation Format(s)
Facile preparation of silicon/carbon composite with porous architecture for advanced lithium-ion battery anode. / Shi, Haofeng; Zhang, Wenyuan; Wang, Donghua et al.
In: Journal of Electroanalytical Chemistry, Vol. 937, 117427, 15.05.2023.
In: Journal of Electroanalytical Chemistry, Vol. 937, 117427, 15.05.2023.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review