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Interfacial Modulation of a Self-Sacrificial Synthesized SnO2@Sn Core-Shell Heterostructure Anode toward High-Capacity Reversible Li+ Storage

文献类型： 外文期刊

作者： Deng, Bo 1 ; He, Rong 2 ; Zhang, Jing 2 ; You, Caiyin 2 ; Xi, Yonglan 3 ; Xiao, Qingbo 3 ; Zhang, Yongzheng 4 ; Liu, Haitao 5 ; Liu, Meinan 6 ; Ye, Fangmin 9 ; Lin, Hongzhen 6 ; Wang, Jian 6 ;

作者机构： 1.Xian Univ Technol, Adv Mat Anal & Test Ctr, Xian 710048, Shaanxi, Peoples R China

2.Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Shaanxi, Peoples R China

3.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Inst Anim Sci, Nanjing 210014, Peoples R China

4.East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

5.Inst Appl Phys & Computat Math, Lab Computat Phys, Beijing 100088, Peoples R China

6.Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, I Lab, Suzhou 215123, Peoples R China

7.Chinese Acad Sci, Suzhou Inst Nanotech & Nanob, CAS Key Lab Nanophoton Mat & Devices, Suzhou 215123, Peoples R China

8.Helmholtz Inst Ulm HIU, D-89081 Ulm, Germany

9.Zhejiang Sci Tech Univ, Dept Phys, Hangzhou 310018, Peoples R China

期刊名称：INORGANIC CHEMISTRY （ 影响因子：4.6； 五年影响因子：4.4 ）

ISSN： 0020-1669

年卷期： 2023 年 62 卷 38 期

页码：

收录情况： SCI

摘要： Sn-based anodes are promising high-capacity anode materials for low-cost lithium ion batteries. Unfortunately, their development is generally restricted by rapid capacity fading resulting from large volume expansion and the corresponding structural failure of the solid electrolyte interphase (SEI) during the lithiation/delithiation process. Herein, heterostructural core-shell SnO2-layer-wrapped Sn nanoparticles embedded in a porous conductive nitrogen-doped carbon (SOWSH@PCNC) are proposed. In this design, the self-sacrificial Zn template from the precursors is used as the pore former, and the LiF-Li3N-rich SEI modulation layer is motivated to average uniform Li+ flux against local excessive lithiation. Meanwhile, both the chemically active nitrogen sites and the heterojunction interfaces within SnO2@Sn are implanted as electronic/ionic promoters to facilitate fast reaction kinetics. Consequently, the as-converted SOWSH@PCNC electrodes demonstrate a significantly boosted Li+ capacity of 961 mA h g(-1) at 200 mA g(-1) and excellent cycling stability with a low capacity decaying rate of 0.071% after 400 cycles at 500 mA g(-1), suggesting their great promise as an anode material in high-performance lithium ion batteries.

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