In Situ Synthesis of Vertical Standing Nanosized NiO Encapsulated in Graphene as Electrodes for High‐Performance Supercapacitors,Advanced Science

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In Situ Synthesis of Vertical Standing Nanosized NiO Encapsulated in Graphene as Electrodes for High‐Performance Supercapacitors
Advanced Science ( IF 14.3 ) Pub Date : 2017-12-27 , DOI: 10.1002/advs.201700687
Jinghuang Lin ₁ , Henan Jia ₁ , Haoyan Liang ₁ , Shulin Chen ₁ , Yifei Cai ₁ , Junlei Qi ₁ , Chaoqun Qu ₂ , Jian Cao ₁ , Weidong Fei ₁ , Jicai Feng ₁

Affiliation

NiO is a promising electrode material for supercapacitors. Herein, the novel vertically standing nanosized NiO encapsulated in graphene layers (G@NiO) are rationally designed and synthesized as nanosheet arrays. This unique vertical standing structure of G@NiO nanosheet arrays can enlarge the accessible surface area with electrolytes, and has the benefits of short ion diffusion path and good charge transport. Further, an interconnected graphene conductive network acts as binder to encapsulate the nanosized NiO particles as core–shell structure, which can promote the charge transport and maintain the structural stability. Consequently, the optimized G@NiO hybrid electrodes exhibit a remarkably enhanced specific capacity up to 1073 C g⁻¹ and excellent cycling stability. This study provides a facial strategy to design and construct high‐performance metal oxides for energy storage.

中文翻译：

原位合成石墨烯封装的立式纳米氧化镍作为高性能超级电容器的电极

NiO是一种很有前景的超级电容器电极材料。在这里，封装在石墨烯层中的新型垂直纳米氧化镍（G@NiO）被合理设计并合成为纳米片阵列。这种独特的G@NiO纳米片阵列垂直站立结构可以扩大电解质可接触的表面积，并具有短离子扩散路径和良好的电荷传输的优点。此外，互连的石墨烯导电网络充当粘合剂，将纳米级氧化镍颗粒封装为核壳结构，可以促进电荷传输并保持结构稳定性。因此，优化的G@NiO混合电极表现出显着增强的比容量高达1073 C g ^-1和优异的循环稳定性。这项研究提供了设计和构建用于储能的高性能金属氧化物的面部策略。

更新日期：2017-12-27

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