储能科学与技术 ›› 2022, Vol. 11 ›› Issue (4): 1110-1120.doi: 10.19799/j.cnki.2095-4239.2021.0505

• 国际优秀储能青年科学家专刊 • 上一篇    下一篇

PTCDI//δ-MnO2 水系铵离子电池性能研究

孙颖1(), 赵钦1, 尹博思1(), 马天翼2()   

  1. 1.辽宁大学,辽宁 沈阳 110036
    2.斯威本科技大学,澳大利亚 墨尔本 3000
  • 收稿日期:2021-09-27 修回日期:2021-11-01 出版日期:2022-04-05 发布日期:2022-04-11
  • 通讯作者: 尹博思,马天翼 E-mail:853950893@qq.com;yinbosi@lnu.edu.cn;tianyima@swin.edu.au
  • 作者简介:孙颖(1997—),女,硕士研究生,主要从事水系铵离子电池的研究,E-mail:853950893@qq.com
  • 基金资助:
    国家自然科学基金(52071171);辽宁省“兴辽英才”创新领军人才(XLYC1802005);辽宁省“百千万人才工程”百人层次(LNBQW2018B0048);辽宁省优秀青年(2019-YQ-04);ARC Future Fellowship(FT210100298)

Performance of PTCDI//δ-MnO2 aqueous ammonium-ion battery

Ying SUN1(), Qin ZHAO1, Bosi YIN1(), Tianyi MA2()   

  1. 1.Liaoning University, Shenyang 110036, Liaoning, China
    2.Centre for Translational Atomaterials, School of Science, Swinburne University of Technology, Melbourne 3000, Australia
  • Received:2021-09-27 Revised:2021-11-01 Online:2022-04-05 Published:2022-04-11
  • Contact: Bosi YIN,Tianyi MA E-mail:853950893@qq.com;yinbosi@lnu.edu.cn;tianyima@swin.edu.au

摘要:

以铵根离子为载流子的可充电水系铵离子电池具有诸多本征优势,然而对于其全电池的研究与探索仍然处于起步阶段。本文首次报道了PTCDI//δ-MnO2铵离子电池体系。该电池采用0.5 mol/L NH4Ac作为电解液,以层状δ-MnO2作为正极材料,3, 4, 9, 10-四甲酰二亚胺(PTCDI)作为有机负极,可以在0~1.5 V电压窗口内稳定工作。本文中的层状δ-MnO2正极材料采用简单的KMnO4热分解法制备,并通过XRD、SEM、TEM、XPS、FTIR、拉曼光谱等手段对δ-MnO2纳米片正极进行了表征。实验研究结果表明,通过合理搭配PTCDI纳米粒子负极,该全电池在0.5 A/g的电流密度下循环500圈后,容量保持率仍为初始容量的92%,库仑效率接近100%,具有优异的循环稳定性。同时系统地研究了δ-MnO2纳米片正极的储能机理以及PTCDI有机负极的储铵动力学特性。非原位XPS光谱结果表明NH4+可以在正极材料中实现可逆地脱嵌。该全电池具有较高的电压窗口,可以较为轻松地向风扇及LED灯等常见小型电器供电,具有良好的发展前景。综上所述,新材料的开发对构建新一代安全环保的水系铵离子电池具有重要意义。

关键词: 水系铵离子电池, δ-MnO2, PTCDI, 循环稳定性, 储铵机理

Abstract:

Rechargeable aqueous ammonium-ion batteries using ammonium ions as carriers have many inherent advantages; however, research and exploration of full batteries are still in their infancy. Herein, we developed a 3,4,9,10-perylenetetracarboxylic diimide (PTCDI)//δ-MnO2 ammonium-ion battery system. The battery uses 0.5 mol/L NH4Ac as the electrolyte, layered δ-MnO2 as the cathode material, and PTCDI as the organic anode material, and it can work stably in the voltage range of 0—1.5 V. The layered δ-MnO2 cathode material was prepared through simple thermal decomposition of KMnO4 and was characterized by XRD, SEM, TEM, XPS, FTIR, and Raman spectroscopy. Through a proper combination of the PTCDI nanoparticle anode, the capacity retention rate of the full battery remained 92% of the initial capacity after 500 cycles at a current density of 0.5 A/g, and the coulombic efficiency was close to 100%, indicating excellent cycle stability. In addition, the energy storage mechanism of the δ-MnO2 nanosheet cathode and the ammonium-ion storage dynamics kinetics of the PTCDI organic anode were systematically studied. Ex situ XPS revealed that NH4+ can be reversibly intercalated/deintercalated in the cathode material. The full battery has a relatively high voltage window; thus, it can easily supply power to common electrical appliances, such as small fans and LEDs, and has a good development prospects. In summary, developing novel materials is of great significance to the construction of a new generation of safe and environmentally friendly aqueous ammonium-ion batteries.

Key words: aqueous ammonium-ion battery, δ-MnO2, PTCDI, cycle stability, ammonium-ion storage mechanism

中图分类号: