Nanobelts-constructed porous TiO2-B@SnS2 heterostructure hybrids for enhanced lithium storage performance
Nanobelts-constructed porous TiO2-B@SnS2 heterostructure hybrids for enhanced lithium storage performance
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DOI：
10.1007/s10854-021-06255-0
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发表时间：
2021-03
期刊：
影响因子：
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通讯作者：
C. Cai;Meiyu Song;Q. Ou;Jianmei Li;Chang-Rok An
中科院分区：
文献类型：
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作者：
C. Cai;Meiyu Song;Q. Ou;Jianmei Li;Chang-Rok An
合金反应型材料由于具有较高的理论容量和优良的电子导电性，受到国内外研究者的深入研究。然而，这种类型的电极的材料在重复的锂化-脱锂过程中表现出差的动力学和显著的体积塌陷。在此，通过在多孔TiO 2-B纳米片和少层SnS 2纳米片的界面之间构建异质结构，为SnS 2纳米片的成核和生长提供高活性位点，并抑制SnS 2纳米片的团聚，从而提供快速传输通道并抑制在放电/充电过程中的体积塌陷的有效方法。储锂性能和理论计算均表明，多孔TiO 2-B纳米带为锂离子的吸附和传输提供了更多的活性位，从而有效地提高了电极结构的稳定性。总之，TiO 2-B@SnS2杂化材料比纯SnS 2纳米片具有更好的倍率性能和循环性能。本工作对高性能合金型阳极材料的设计和施工具有一定的实用价值。
Attributing to the high theoretical capacity and excellent electronic conductivity, alloy reaction type materials get in-depth research by domestic and foreign researchers. However, the materials of this type of electrode exhibit poor kinetics and substantial volume collapse during the repeated lithiation–delithiation process. Herein, an efficient method to provide a fast transmission channel and suppress the volume collapse during the discharge/charge process by constructing the heterostructure between the interface of the porous TiO2-B nanoblets and few-layer SnS2nanosheets, which provides high-active sites for the nucleation and growth of SnS2nanosheets, and inhibits the agglomeration of SnS2nanosheets. Both lithium storage performance and theoretical calculations definite that porous TiO2-B nanobelts offers more active sites for the adsorption and transmission of lithium ion and then effectively improve the stability of the electrode structure. In conclusion, TiO2-B@SnS2hybrid exhibits better rate and cycle performance than pure SnS2nanosheets. This work provides practical value for the design and construction of high performance alloy-type anode materials.