Cobalt–Nickel Phosphate Composites for the All-Phosphate Asymmetric Supercapacitor and Oxygen Evolution Reaction,ACS Applied Materials & Interfaces

当前位置： X-MOL 学术 › ACS Appl. Mater. Interfaces › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Cobalt–Nickel Phosphate Composites for the All-Phosphate Asymmetric Supercapacitor and Oxygen Evolution Reaction
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-07-13 , DOI: 10.1021/acsami.1c04614
De Wang ₁ , Yanjing Wang ₁ , Zhenyu Fu ₁ , Yanbin Xu ₁ , Li-Xia Yang ₁ , Feng Wang ₁ , Xiaoling Guo ₁ , Wenjuan Sun ₁ , Zheng-Long Yang ₁

Affiliation

Recently, design of cost-effective multifunctional electromaterials for supercapacitors and oxygen evolution reaction (OER) and enhancing their functionalities have become an emphasis in energy storage and conversion. Herein, a series of cheap and functional phosphate composites with different ratios of cobalt and nickel are synthesized using a simple polyalcohol refluxing method, and their excellent capacity and OER properties are systematically studied. Notably, owing to the different major role of Co and Ni elements in the phosphate composites for capacity and OER, the optimal electroconductibility, structural adjustment, electrochemical active sites, and activities for capacity and OER are obtained from the composites with the different ratios of Co/Ni. In addition, using high-capacity BiPO₄ (BPO) as the negative electrodes, the new type of all-phosphate asymmetric supercapacitor (CNPO-40//BPO) shows a high energy density and reaches 36.84 W h kg^–1 at a power density of 254.52 W kg^–1. Its cyclic stability is also more excellent than that of the CNPO-40//AC device using commercial activated carbon as the negative electrodes. This study is beneficial to the more in-depth research on efficient dual-function electromaterials in capacity and OER and provides a high-efficient way to improve the practicality of asymmetric supercapacitors using the high-capacity Bi-based electromaterials as the negative electrodes.

中文翻译：

用于全磷酸盐不对称超级电容器和氧气释放反应的钴-镍磷酸盐复合材料

最近，设计用于超级电容器和析氧反应 (OER) 的具有成本效益的多功能电子材料并增强其功能已成为能量存储和转换的重点。在此，采用简单的多元醇回流法合成了一系列具有不同钴镍比例的廉价、功能性磷酸盐复合材料，并对其优异的容量和OER性能进行了系统研究。值得注意的是，由于 Co 和 Ni 元素在磷酸盐复合材料中对容量和 OER 的主要作用不同，从具有不同 Co 比例的复合材料中获得了最佳的导电性、结构调整、电化学活性位点以及容量和 OER 的活性/你。此外，使用高容量 BiPO ₄（BPO）作为负电极，所述新型全磷酸盐不对称超级电容器（CNPO-40 // BPO）示出了高的能量密度，达到36.84 W时千克^-1处的254.52的功率密度钨千克^-1。其循环稳定性也比使用商用活性炭作为负极的CNPO-40//AC装置更优异。该研究有利于更深入地研究高效的双功能电材料在容量和OER方面的研究，并为提高使用高容量Bi基电材料作为负极的非对称超级电容器的实用性提供了一种高效的途径。

更新日期：2021-07-28

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南