L-Cysteine-Assisted Synthesis of Urchin-Like γ-MnS and Its Lithium Storage Properties.

L-Cysteine-Assisted Synthesis of Urchin-Like γ-MnS and Its Lithium Storage Properties.
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L-半胱氨酸辅助合成海胆状γ-MnS及其储锂性能

DOI:
10.1186/s11671-016-1664-6
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发表时间:
2016-12
影响因子:
--
通讯作者:
Di Y
Di Y
中科院分区:
材料科学3区
文献类型:
--
作者:
Xu D;Jiao R;Sun Y;Sun D;Zhang X;Zeng S;Di Y

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硫化锰由于其高能量密度和低电压电位而在锂离子电池领域受到越来越多的关注。本文以MnCl_2·4H_2O和L-半胱氨酸为原料,采用一种简单的方法制备了海胆状的γ-MnS微结构。海胆状的γ-MnS微结构表现出优异的循环稳定性(在500 mA g− 1的电流密度下,1000次循环后为823.4 mA h g−1)。其放电电压约为0.75V,是一种很好的锂离子电池负极材料。利用SEM、TEM、XRD等手段对活性物质在充放电过程中的变化进行了研究,结果表明,γ-MnS在充放电过程中的结构细化和再形成对保持其电化学性能起着重要作用。
MnS has been attracting more and more attentions in the fields of lithium ion batteries (LIBs) because of its high energy density and low voltage potential. In this paper, we present a simple method for the preparation of urchin-like γ-MnS microstructures using l-cysteine and MnCl2 · 4H2O as the starting materials. The urchin-like γ-MnS microstructures exhibit excellent cycling stability (823.4 mA h g−1 at a current density of 500 mA g−1, after 1000 cycles). And the discharge voltage is about 0.75 V, making it a good candidate for the application as the anode material in LIBs. SEM, TEM, and XRD were employed to inspect the changes of the active materials during the electrochemical process, which clearly indicate that the structural pulverization and reformation of the γ-MnS microstructures play important roles for the maintenance of the electrochemical performance during the charge/discharge process.
SNO2/石墨烯复合材料作为锂离子电池的阳极材料的出色周期性能和高可逆能力。
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