One-step synthesis of uniformly distributed SiO x –C composites as stable anodes for lithium-ion batteries
SiO x is one of the most promising anode materials for lithium-ion batteries (LIBs), due to its high theoretical capacity and low cost. However, the huge volume expansion and low electron/ion diffusion rate hinder its further commercial applications. Herein, a simple molecular polymerization method...
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Published in | Dalton transactions : an international journal of inorganic chemistry Vol. 51; no. 31; pp. 11909 - 11915 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
09.08.2022
|
Online Access | Get full text |
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Summary: | SiO
x
is one of the most promising anode materials for lithium-ion batteries (LIBs), due to its high theoretical capacity and low cost. However, the huge volume expansion and low electron/ion diffusion rate hinder its further commercial applications. Herein, a simple molecular polymerization method is developed to synthesize N,P co-doped SiO
x
–C composites (denoted as SiO
x
–C@CNT), in which SiO
x
and carbon are uniformly dispersed at the atomic level, and the embedded carbon nanotubes improve the lithium ion diffusion kinetics. Benefiting from the unique structure, the SiO
x
–C@CNT composites exhibit a high reversible capacity of 848 mA h g
−1
at 0.1 A g
−1
and long cycling stability (84.0% capacity retention after 1500 cycles). More impressively, the LiCoO
2
∥SiO
x
–C@CNT full battery also exhibits stable cycle life (only 4.7% capacity loss after 300 cycles at 1 C). These results show the application potential of the SiO
x
–C@CNT anode in LIBs. |
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ISSN: | 1477-9226 1477-9234 |
DOI: | 10.1039/D2DT01843H |