Interfacial Electric Field Enhanced Free‐Standing VO2/rGO Aerogel Anode with Ultra High Mass Energy Density for Aqueous Ammonium Ion Battery

作者：Jia’ni Gong, Pengfei Bai, Yifu Zhang, Zhenhua Zhou, Qiushi Wang, Haifeng Lv, Tao Hu, Xiaojun Wu, Changgong Meng · 发表于：Small · 年份：2024 · DOI：10.1002/smll.202408467 · 被引用次数：17 · 研究领域：Advanced battery technologies research、Advancements in Battery Materials、Supercapacitor Materials and Fabrication

Abstract Aqueous batteries have become a promising means of energy storage due to its environmental friendliness. Nevertheless, it often exhibits limited energy density that hinder their application. Considering that ammonium ion (NH 4 + ) has a low mass and a small hydration radius, aqueous ammonium ion batteries (AAIBs) are expected to solve the problem of low energy density. Herein, we obtain Vanadium dioxide/reduced graphene oxide aerogel (VOGA) by in‐situ growth of VO 2 on the graphene surface for interfacial electric field enhanced AAIBs to achieve high mass energy density. The VOGA free‐standing electrode achieves a specific capacity of up to 655 mA g −1 at a current density of 0.5 A g −1 . And the mass energy density of the VOGA.