Layered nanoblades of iron cobaltite for high performance asymmetric supercapacitors
Layered nanoblades of iron cobaltite for high performance asymmetric supercapacitors
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DOI：
10.1016/j.apsusc.2019.01.184
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发表时间：
2019-05-15
影响因子：
6.7
通讯作者：
Sharma, Raj Kishore
中科院分区：
文献类型：
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作者：
Lalwani, Shubra;Munjal, Mehak;Sharma, Raj Kishore
二维（2-D）纳米片可以暴露许多活性位点、价态，并且在分层时能够缩短扩散路径。本文中，制备了钴酸铁（FeCo 2 O 4）的层状纳米片，并以十字交叉的方式排列，以表达其电化学优点。纳米片的尖锐边缘通过更多的化学反应位点做出贡献，而0.7的b值表明法拉第电容（赝电容）电荷存储。在2 A g（-1）下通常为960.0 F g（-1），具有优异的循环稳定性（10，000次循环为94%），在超级电容器电池中表现出出色的性能。在非对称超级电容器中组装铁钴酸盐（FeCo 2 O 4）纳米片与石墨烯纳米带（负电极）时，其在6391.7 W kg（-1）的功率密度下获得了34.5 Wh kg（-1）的极好能量密度，5000次循环保持116.5%。
Two dimensional (2-D) nanoblades can expose numerous active sites, valence states and enable shortened diffusion paths upon layering. Herein, layered nanoblades of iron cobaltite (FeCo2O4) are prepared and aligned in a criss-cross manner to express their electrochemical merits. Sharp edges of the nanoblades contribute through more chemically reactive sites, while, b-value of 0.7 suggests faradaic capacitive (pseudocapacitive) charge storage. Typically 960.0 F g(-1) at 2 A g(-1) with excellent cycling stability (94% for 10,000 cycles) demonstrates brilliant performance in supercapacitor cell. On assembling iron cobaltite (FeCo2O4) nanoblades with graphene nanoribbons (negative electrode) in an asymmetric supercapacitor it pays off with a superb energy density of 34.5 Wh kg(-1) at a power density of 6391.7 W kg(-1) retaining 116.5% for 5000 cycles.