Sustainable silicon anodes facilitated via a double‐layer interface engineering: Inner SiOx combined with outer nitrogen and boron co‐doped carbon

Jun Zhou; Yao Lu; Lishan Yang; Wenqiang Zhu; Weifang Liu; Yahui Yang; Kaiyu Liu

doi:10.1002/cey2.176

journal article Open Access Jan 21, 2022

Sustainable silicon anodes facilitated via a double‐layer interface engineering: Inner SiOx combined with outer nitrogen and boron co‐doped carbon

Jun Zhou

Yao Lu

Lishan Yang

Wenqiang Zhu Weifang Liu

Yahui Yang Kaiyu Liu

Carbon Energy Vol. 4 No. 3 pp. 399-410 · Wiley

View at Publisher Save 10.1002/cey2.176

Abstract

AbstractSilicon‐based (Si) materials are promising anodes for lithium‐ion batteries (LIBs) because of their ultrahigh theoretical capacity of 4200 mA h g−1. However, commercial applications of Si anodes have been hindered by their drastic volume variation (∼300%) and low electrical conductivity. Here, to tackle the drawbacks, a hierarchical Si anode with double‐layer coatings of a SiOx inner layer and a nitrogen (N), boron (B) co‐doped carbon (C–NB) outer layer is elaborately designed by copyrolysis of Si–OH structures and a H3BO3‐doped polyaniline polymer on the Si surface. Compared with the pristine Si anodes (7 mA h g−1 at 0.5 A g−1 after 340 cycles and 340 mA h g−1 at 5 A g−1), the modified Si‐based materials (Si@SiOx@C–NB nanospheres) present superior cycling stability (reversible 1301 mA h g−1 at 0.5 A g−1 after 340 cycles) as well as excellent rate capability (690 mA h g−1 at 5 A g−1) when used as anodes in LIBs. The unique double‐layer coating structure, in which the inner amorphous SiOx layer acts as a buffer matrix and the outer defect‐rich carbon enhances the electron diffusion of the whole anode, makes it possible to deliver excellent electrochemical properties. These results indicate that our double‐layer coating strategy is a promising approach not only for the development of sustainable Si anodes but also for the design of multielement‐doped carbon nanomaterials.

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Citations

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References

Details

Published: Jan 21, 2022
Vol/Issue: 4(3)
Pages: 399-410
License: View

Authors

J

Jun Zhou

Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), National and Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of Resources, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province Hunan Normal University Changsha Hunan P.R. China

Y

Yao Lu

Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), National and Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of Resources, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province Hunan Normal University Changsha Hunan P.R. China

L

Lishan Yang

Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), National and Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of Resources, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province Hunan Normal University Changsha Hunan P.R. China

W

Wenqiang Zhu

Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), National and Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of Resources, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province Hunan Normal University Changsha Hunan P.R. China

W

Weifang Liu

College of Chemistry and Chemical Engineering, Central South University Changsha Hunan P.R. China

Y

Yahui Yang

Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), National and Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of Resources, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province Hunan Normal University Changsha Hunan P.R. China

K

Kaiyu Liu

College of Chemistry and Chemical Engineering, Central South University Changsha Hunan P.R. China

Funding

National Natural Science Foundation of China Award: 21805083

Cite This Article

Jun Zhou, Yao Lu, Lishan Yang, et al. (2022). Sustainable silicon anodes facilitated via a double‐layer interface engineering: Inner SiOx combined with outer nitrogen and boron co‐doped carbon. Carbon Energy, 4(3), 399-410. https://doi.org/10.1002/cey2.176

Sustainable silicon anodes facilitated via a double‐layer interface engineering: Inner SiOx combined with outer nitrogen and boron co‐doped carbon

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