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Core–Shell Structured C@SiO2 Hollow Spheres Decorated with Nickel Nanoparticles as Anode Materials for Lithium-Ion Batteries
Small ( IF 13.0 ) Pub Date : 2021-10-27 , DOI: 10.1002/smll.202103673 Tao Liu 1, 2 , Yinhu Qu 1 , Jiahao Liu 3 , Liuyang Zhang 3 , Bei Cheng 3 , Jiaguo Yu 2, 3
Small ( IF 13.0 ) Pub Date : 2021-10-27 , DOI: 10.1002/smll.202103673 Tao Liu 1, 2 , Yinhu Qu 1 , Jiahao Liu 3 , Liuyang Zhang 3 , Bei Cheng 3 , Jiaguo Yu 2, 3
Affiliation
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Silicon oxide is regarded as a promising anode material for lithium-ion batteries owing to high theoretical capacity, abundant reserve, and environmental friendliness. Large volumetric variations during the discharging/charging and intrinsically poor electrical conductivity, however, severely hinder its application. Herein, a core–shell structured composite is constructed by hollow carbon spheres and SiO2 nanosheets decorated with nickel nanoparticles (Ni-SiO2/C HS). Hollow carbon spheres, as mesoporous cores, not only significantly facilitate the electron transfer but also prominently enhance the mechanical robustness of anode materials, which separately improves the rate performance and the cyclic durability. Besides, ultrathin SiO2 nanosheets, as hierarchical shells, provide abundant electrochemical active surface for capacity increment. Moreover, nickel nanoparticles boost the transport capacity of electrons in SiO2 nanosheets. Such a unique architecture of Ni-SiO2/C HS guarantees an enhanced discharge capacity (712 mAh g−1 at 0.1 A g−1) and prolonged cyclic durability (352 mAh g−1 at 1.0 A g−1 after 500 cycles). The present work offers a possibility for silica-based anode materials in the application of next-generation lithium-ion batteries.
中文翻译：
用镍纳米粒子装饰的核壳结构 C@SiO2 空心球作为锂离子电池的负极材料
氧化硅具有理论容量高、储量丰富、环境友好等优点，被认为是一种很有前途的锂离子电池负极材料。然而，放电/充电过程中的大体积变化和本质上较差的导电性严重阻碍了其应用。在此，核壳结构的复合材料由空心碳球和用镍纳米颗粒 (Ni-SiO 2 /C HS)装饰的SiO 2纳米片构成。中空碳球作为介孔核，不仅显着促进电子转移，而且显着增强了负极材料的机械强度，分别提高了倍率性能和循环耐久性。此外，超薄 SiO 2纳米片作为分层壳，为容量增加提供了丰富的电化学活性表面。此外，镍纳米颗粒提高了 SiO 2纳米片中电子的传输能力。镍的SiO的这种独特的结构2 / C HS保证增强的放电容量（毫安712克-1 0.1 A G -1）和延长的循环耐久性（352毫安克-1在1.0克-1 500次循环后） . 目前的工作为二氧化硅基负极材料在下一代锂离子电池的应用提供了可能。
更新日期：2021-12-09
中文翻译：
用镍纳米粒子装饰的核壳结构 C@SiO2 空心球作为锂离子电池的负极材料
氧化硅具有理论容量高、储量丰富、环境友好等优点，被认为是一种很有前途的锂离子电池负极材料。然而，放电/充电过程中的大体积变化和本质上较差的导电性严重阻碍了其应用。在此，核壳结构的复合材料由空心碳球和用镍纳米颗粒 (Ni-SiO 2 /C HS)装饰的SiO 2纳米片构成。中空碳球作为介孔核，不仅显着促进电子转移，而且显着增强了负极材料的机械强度，分别提高了倍率性能和循环耐久性。此外，超薄 SiO 2纳米片作为分层壳，为容量增加提供了丰富的电化学活性表面。此外，镍纳米颗粒提高了 SiO 2纳米片中电子的传输能力。镍的SiO的这种独特的结构2 / C HS保证增强的放电容量（毫安712克-1 0.1 A G -1）和延长的循环耐久性（352毫安克-1在1.0克-1 500次循环后） . 目前的工作为二氧化硅基负极材料在下一代锂离子电池的应用提供了可能。
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