Study on Synthesis and Modification of SnO2@voids@C-SnO as Anode Material for Lithium-Ion Battery by Self-assembled CaCO3 Template Method

doi:10.12068/j.issn.1005-3026.2023.03.008

Abstract

Abstract: A SnO₂@voids@C-SnO material with three-dimensional hierarchical-porous carbon skeleton structure was prepared by using CaCO₃ as template. Then， Ni element was doped in the SnO₂@voids@C-SnO material by a sol-gel method. The crystal structure and morphology of the prepared sample were characterized by XRD and SEM， respectively， and the electrochemical performance of the above sample-based battery was tested. The results show that the first discharge specific capacity of the SnO₂@voids@C-SnO material at 50mA· g^-1 was 1092mAh· g^-1. The specific capacity of the SnO₂@voids@C-SnO material can be effectively increased by Ni doping. A 25% Ni-doped material obtained the highest first discharge specific capacity of 1414.6mAh· g^-1， and still had a higher discharge specific capacity of 617mAh· g^-1 after 70 cycles， the sample also showed high-rate performance. The increased particle dispersion after Ni doping was conducive to decreasing volume expansion， thus， endowing the Ni-doped SnO₂@voids@C-SnO material with high electrochemical properties.

Key words: SnO₂; anode material; porous; sol-gel method; template method

CLC Number:

TM912

HAO Xi-juan， HU Jian-nan， ZHAO He， LI Jian-zhong. Study on Synthesis and Modification of SnO₂@voids@C-SnO as Anode Material for Lithium-Ion Battery by Self-assembled CaCO₃ Template Method[J]. Journal of Northeastern University(Natural Science), 2023, 44(3): 363-369.

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Study on Synthesis and Modification of SnO₂@voids@C-SnO as Anode Material for Lithium-Ion Battery by Self-assembled CaCO₃ Template Method

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