Hydrogen Bond Shielding Effect for High‐Performance Aqueous Zinc Ion Batteries. Issue 12 (30th January 2022)

• Record Type: Journal Article
• Authors: Sun, Tianjiang; Zheng, Shibing; Nian, Qingshun; Tao, Zhanliang
• Is Part Of: Small. Volume 18:Issue 12(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-01-30
• Subjects: aqueous zinc ion batteries -- cathode materials -- hydrogen bond shielding effect -- (NH 4) 0.125MnO 2 materials; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.202107115
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: Manganese oxides are highly desirable for the cathode of rechargeable aqueous zinc ion batteries (AZIBs) owing to their low cost and high abundance. However, the terrible structure stability of manganese oxide limits its practical application. Here, it is demonstrated that the hydrogen‐bond shielding effect can improve the electrochemical performance of manganese oxide. Briefly, (NH4 )0.125 MnO2 (NHMO) is prepared by introducing NH4 + into the tunnel structure of α‐MnO2 . The robust hydrogen bonds between N‐H and host O atoms can stabilize the lattice structure of α‐MnO2 and suppress the dissolution of Mn element. More importantly, it can also accelerate ions mobility kinetics by weakening the electrostatic interaction of host O atoms. Thus, the fabricated Zn||NHMO battery possesses impressive cycling life (99.5% of capacity retention over 10 000 cycles) and rate capability (109 mA h g –1 of discharge capacity at 6000 mA g –1 ). Comprehensive analyses reveal the essences of interfacial charge and bulk ions transfer. This finding opens new opportunities for the development of high‐performance AZIBs. Abstract : An aqueous zinc ion battery that is based on (NH4 )0.125 MnO2 cathode (NHMO) is developed. The robust hydrogen bonds between NH4 + and host O atoms not only stabilize crystal structure of NHMO but also facilitate ion diffusion in host material. Thus, the fabricted Zn||NHMO battery exhibits durable cycling life and excellent rate capability.