廢料之復活： 利用鍍膜及電漿表面改質技術於回收矽/碳化矽之複合材 與其鋰離子電池之應用

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废料之复活：利用镀膜及电浆表面改质技术於回收矽/碳化矽之复合材与其锂离子电池之应用

A Revival of Waste: Surface Modification via Coating and Plasma Jet in Recycled Si/SiC Composite for Lithium Ion Batteries

陈秉宏 , 博士　　导师：杜正恭　　

英文

锂离子电池；矽；废料回收；大气电浆；表面改质；镀膜； Lithium ion batteries ； Silicon ； Recycled waste ； Atmospheric pressure plasma ； Surface modification ； Coating

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摘要 │ 参考文献 (176) │ 国际计量

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In the past decade, the rising development of lithium ion batteries (LIBs) has been recognized as a tidal current for solving energy storage related issues. Under this technical billow, the demands of active materials with lower environmental impact and higher energy density are considered as the criteria for LIBs materials. Especially for anodic material, the present carbon-based electrode is limited in the potential applications with high capacity because of its theoretic capacity (372 mAh/g). To achieve the goal for high capacity anodes, silicon (Si) with 3590 mAh/g theoretical capacity meets the requirement by forming Li15Si4 phase during cycling processes to replace present conventional carbon-based batteries. However, the capacity fading caused by the intrinsic drawbacks of volumetric expansion and continuous formation of solid electrolyte interphase hinders the dissemination of Si-based LIBs. To overcome the disadvantages of Si, numerous studies have endeavored (1) to shrink Si particles to nanometer scales by using various morphology-chemical synthesis techniques, (2) to wrap or mix conductive additives onto particles or into slurries, and (3) to add electrolyte additives. Unfortunately, the as-mentioned methods mostly fail to accommodate the cost-effectiveness of commercialization and low pollution of environmental friendliness.   
    In the pursuit of low cost and high environmental friendly anode material, a distinct resource of Si-based anode material is explored in this study. The recycled material is extracted from the cutting waste fluid produced in solar panel industry. After purification technology of chemical rinsing and physical separation, the obtained composites show much larger particle size than commonly nanolized Si particles, and possess the abundant organic bonds and native oxide on the surface of particle. Unlike conventional methods to focus on the synthesis process of powder, the as-prepared electrodes will be treated via various surface modifications, including techniques of carbon deposition and atmospheric pressure plasma jet. The combined processing reduces the capacity degradation by interfacial control to convert the surface bonds with the effectiveness to suppress the growth of SEI, and then maintain the stabilization of electrode during cycling. In addition, the entire electrode collocates with conductive agent and electrolyte additive to provide the conductivity and to improve the internal SEI formation. Overall, the developed techniques of surface modifications are not only scalable, simple, low-cost and environmental friendly but also effective to achieve the excellent performance with high capacity. It is expected for similar potential usage in others battery system. The selected recycled waste for anodic material should be applicable and suitable for the future blueprint in the commercialization for LIBs.

参考文献 ( 176 ) 〈TOP〉

(1) T. H. Tsai; Y. P. Shih; Y. F. Wu. Journal of the Air & Waste Management Association, 2013, 63(5), 521.
连结：
(4) H. J. Möller. Advanced Engineering Materials, 2004, 6(7), 501.
连结：
(12) J. M. Tarascon; M. Armand. Nature, 2001, 414, 359.
连结：
(13) S. Flandrois; B. Simon. Carbon, 1999, 37(2), 165.
连结：
(18) R. Bhandavat; G. Singh. The Journal of Physical Chemistry C, 2013, 117(23), 11899.
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使用DOI作为永久连结

引用含有DOI的文献

DOI可强化引用精确性、增强学术圈连结，并给予使用者跨平台的良好使用经验，目前在全世界已有超过五千万个对象申请DOI。 如想对DOI的使用与概念有进一步了解，请参考 （ ） 。

DOI可强化引用精确性、增强学术圈连结，并给予使用者跨平台的良好使用经验，目前在全世界已有超过五千万个对象申请DOI。如想对DOI的使用与概念有进一步了解，请参考（）。