共聚物模板辅助合成高倍率性能多孔Li 2 FeSiO 4 @C/CNTs纳米复合正极材料(英文)
发布时间:2021-02-24 04:23
通过溶胶-凝胶法制备了Li2FeSiO4@C/CNTs(LFS@C/CNTs)纳米复合材料,其中三嵌段共聚物P123用作结构导向剂和碳源,碳纳米管作为导电线提高材料的导电性。LFS@C/CNTs不仅具有海绵状纳米孔,能够与电解液充分接触改善锂离子的传输路径,同时由非晶碳和碳纳米管构成的三维桥联导电网络利于电子的快速传递,提高了材料大电流充放电能力和循环稳定性。复合后的LFS@C/CNTs的高倍率性能相比LFS@C明显提高,当CNTs的掺量为4%,电压窗口为1.54.5 V,0.1C电流密度下放电比容量为182 m Ah·g-1。在10C经70次循环后该材料的放电比容量能保持在117 m Ah·g-1,是LFS@C放电比容量(55 m Ah·g-1)的两倍。
【文章来源】:无机化学学报. 2015,31(12)北大核心
【文章页数】:10 页
【文章目录】:
0 Introduction
1 Experimental
1.1 Chemicals
1.2Synthesis of porous Li2Fe Si O4@C/CNTsnanocomposite
1.3 Materials characterization
1.4 Electrochemical measurements
2 Results and discussion
2.1 Characterization of the products
2.2 Electrochemical characteristics
2.3 Control experiments
3 Conclusions
本文编号:3048778
【文章来源】:无机化学学报. 2015,31(12)北大核心
【文章页数】:10 页
【文章目录】:
0 Introduction
1 Experimental
1.1 Chemicals
1.2Synthesis of porous Li2Fe Si O4@C/CNTsnanocomposite
1.3 Materials characterization
1.4 Electrochemical measurements
2 Results and discussion
2.1 Characterization of the products
2.2 Electrochemical characteristics
2.3 Control experiments
3 Conclusions
本文编号:3048778
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