Si@void@C Nanofibers Fabricated Using a Self-Powered Electrospinning System for Lithium-Ion Batteries
Si@void@C Nanofibers Fabricated Using a Self-Powered Electrospinning System for Lithium-Ion Batteries
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DOI：
10.1021/acsnano.8b01558
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发表时间：
2018-05-01
期刊：
影响因子：
17.1
通讯作者：
Wang, Zhong Lin
中科院分区：
文献类型：
--
作者：
Han, Yu;Zou, Jingdian;Wang, Zhong Lin
近年来，锂离子电池的研究主要集中在从密度、容量、寿命等方面提高锂离子电池的性能，而对锂离子电池制造过程中的能耗成本关注较少。在此，我们报告了一种基于无外部电源的自供电静电纺丝系统的锂离子电池阳极材料的节能制备方法，该系统由旋转摩擦电纳米发电机（r-TENG）、电源管理电路和静电纺丝单元组成。通过从手柄旋转中获取动能，r-TENG能够完全为静电纺丝系统提供动力，以制造用于lib的纳米纤维。所得Si@void@C纳米纤维具有优异的循环性能，循环100次后放电容量为1045.2 mA h g(-1)，容量保持率为88%，在电流密度为5 a g（-1）时具有400 mA h g（-1）的优异高倍率容量，完全可与商用静电纺丝设备媲美。我们的研究展示了一种创新和独特的方法，可以实现极低成本的电极材料制备过程，从而为LIB生产行业带来重大突破。
In recent years, research in lithium-ion batteries (LIBs) has been focused on improving their performance in various ways, such as density, capacity, and lifetime, but little attention has been paid to the energy consumption cost in the manufacturing process. Herein, we report an energy-efficient preparation method of anode materials for LIBs based on a self-powered electrospinning system without an external power source, which consists of a rotatory triboelectric nanogenerator (r-TENG), a power management circuit, and an electrospinning unit. By harvesting kinetic energy from a handle rotation, the r-TENG is able to fully power the electrospinning system to fabricate nanofibers for LIBs. The as-obtained Si@void@C nanofibers present outstanding cyclic performance with a discharge capacity of 1045.2 mA h g(-1) after 100 cycles and 88% capacity retention, along with an excellent high rate capacity of 400 mA h g(-1) at a current density of 5 A g(-1), which are completely comparable with those made by commercial electrospinning equipment. Our study demonstrates an innovative and distinct approach toward an extremely low-cost preparation procedure of electrode materials, leading to a great breakthrough for the LIB production industry.