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首页> 外文期刊>Applied Surface Science >Facile synthesis of hollow Sn-Co@PMMA nanospheres as high performance anodes for lithium-ion batteries via galvanic replacement reaction and in situ polymerization
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Facile synthesis of hollow Sn-Co@PMMA nanospheres as high performance anodes for lithium-ion batteries via galvanic replacement reaction and in situ polymerization

机译：通过电取代反应和原位聚合轻松合成空心Sn-Co @ PMMA纳米球作为锂离子电池的高性能阳极

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摘要

Polymethyl methacrylate (PMMA)-coated hollow Sn-Co nanospheres (Sn-Co@PMMA) with superior electrochemical performance had been synthesized via a facile galvanic replacement method followed by an in situ emulsion polymerization route. The properties were investigated in detail and results show that the hollow Sn-Co nanospheres were evenly coated with PMMA. Benefiting from the protection of the PMMA layers, the hollow Sn-Co@PMMA nanocomposite is capable of retaining a high capacity of 590 mAh g(-1) after 100 cycles with a coulomb efficiency above 98%, revealing better electrochemical properties compared with hollow Sn-Co anodes. The PMMA coating could help accommodate the mechanical strain caused by volume expansion and stabilize the solid electrolyte interphase (SEI) film formed on the electrode. Such a facile process could be further extended to other anode materials for lithium-ion batteries. (C) 2015 Elsevier B.V. All rights reserved.
机译：通过一种简便的电置换方法，然后采用原位乳液聚合方法，合成了具有优异电化学性能的聚甲基丙烯酸甲酯（PMMA）涂层空心锡钴纳米球（Sn-Co @ PMMA）。详细研究了其性能，结果表明空心的Sn-Co纳米球均匀地被PMMA包覆。受益于PMMA层的保护，空心Sn-Co @ PMMA纳米复合材料在100次循环后能够保持590 mAh g（-1）的高容量，库仑效率高于98％，与空心相比具有更好的电化学性能锡钴阳极。 PMMA涂层可帮助适应因体积膨胀而引起的机械应变，并稳定在电极上形成的固体电解质中间相（SEI）膜。这种简便的方法可以进一步扩展到锂离子电池的其他负极材料。 （C）2015 Elsevier B.V.保留所有权利。

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