Elimination of Zinc Dendrites by Graphene Oxide Electrolyte Additive for Zinc-Ion Batteries,ACS Applied Energy Materials

当前位置： X-MOL 学术 › ACS Appl. Energy Mater. › 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.)

Elimination of Zinc Dendrites by Graphene Oxide Electrolyte Additive for Zinc-Ion Batteries
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2021-04-22 , DOI: 10.1021/acsaem.1c00224
Jufni Abdulla _{1,

2} , Jin Cao _{2,

3} , Dongdong Zhang _{2,

3} , Xinyu Zhang ₄ , Chakrit Sriprachuabwong ₅ , Soorathep Kheawhom _{6,

7} , Panyawat Wangyao ₁ , Jiaqian Qin _{2,

7}

Affiliation

Zinc-ion batteries have drawn tremendous attention in the electrochemical energy storage market because of their merits of high safety and low cost, however, the dendrites issue of zinc anodes remains a challenge. Herein, we developed a hybrid electrolyte with graphene oxide as an additive with the functions of promoting the uniform distribution of the electric field and reducing the nucleation overpotential of Zn²⁺, displaying a smooth zinc electrodeposition layer and reaction kinetics. The resultant zinc symmetric battery with graphene oxide additive affords a stable zinc anode which provided service for more than 650 h at 1 mA cm^–2 and an exceptional cycle life of 140 h even at 10 mA cm^–2. In addition, scanning electron microscopy images demonstrated that the deposition of zinc dendrites through the glass fiber separator was the reason for the battery short circuit. It is believed that the graphene oxide additive can remarkably improve the Coulombic efficiency (99.16%) of the batteries via stabilizing the Zn plating/stripping behavior and facilitating Zn²⁺ nucleation. Consequently, the full battery with graphene oxide electrolyte additive exhibited remarkable enhancements in rate performance and cyclability compared to the additive-free electrolyte. The hybrid electrolyte containing solid particles opens a chapter for designing advanced and durable zinc-ion batteries.

中文翻译：

锌离子电池用氧化石墨烯电解质添加剂消除锌枝晶

锌离子电池由于具有高安全性和低成本的优点而在电化学储能市场上引起了极大的关注，然而，锌阳极的枝晶问题仍然是一个挑战。本文中，我们开发了一种以氧化石墨烯为添加剂的杂化电解质，具有促进电场的均匀分布和减少Zn ²⁺的成核超电势，显示光滑的锌电沉积层和反应动力学的功能。所得的带有氧化石墨烯添加剂的锌对称电池可提供稳定的锌阳极，在1 mA cm ^–2时可提供650小时以上的使用寿命，即使在10 mA cm ^–2时也可提供140 h的出色循环寿命。另外，扫描电子显微镜图像证明锌树枝状晶体通过玻璃纤维隔板的沉积是电池短路的原因。可以相信，氧化石墨烯添加剂可通过稳定Zn镀/剥离行为并促进Zn ²⁺成核作用而显着提高电池的库仑效率（99.16％）。因此，与无添加剂的电解质相比，具有氧化石墨烯的电解质添加剂的完整电池在速率性能和循环性方面表现出显着的提高。包含固体颗粒的混合电解质打开了设计先进耐用的锌离子电池的篇章。

更新日期：2021-05-24

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