The electrochemical performance of aqueous rechargeable battery of Zn/Na0.44MnO2 based on hybrid electrolyte

• Published in: Journal of power sources 2016-12, Vol.336, p.35-39
• Main Authors: Wu, Xianwen, Li, Yehua, Xiang, Yanhong, Liu, Zhixiong, He, Zeqiang, Wu, Xianming, Li, Youji, Xiong, Lizhi, Li, Chuanchang, Chen, Jian
• Format: Article
• Language: English
• Subjects: Aqueous sodium ion batteries; Electrode materials; Self-discharge
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2016.10.053

There is a broad application prospect for smart grid about aqueous rechargeable sodium-ion battery. In order to improve its electrochemical performance, a hybrid cationic aqueous-based rechargeable battery system based on the nanostructural Na0.44MnO2 and metallic zinc foil as the positive and negative electrodes respectively is built up. Nano rod-like Na0.44MnO2 is synthesized by sol-gel method followed by calcination at 850 °C for 9 h, and various characterization techniques including the X-ray diffraction (XRD) and scanning electron microscopy (SEM) are used to investigate the structure and morphology of the as-prepared material. The cyclic voltammetry, galvanostatic charge-discharge and self-discharge measurements are performed at the same time. The results show that the battery delivers a very high initial discharge capacity of 186.2 mAh g−1 at 0.2 C-rate in the range of 0.5–2.0 V, and it exhibits a discharge capacity of 113.3 mAh g−1 at high current density of 4 C-rate, indicative of excellent rate capability. •We reported the aqueous battery system of Zn/Na0.44MnO2 based on hybrid electrolyte.•The battery is cheap and environmentally friendly.•It exhibits an excellent rate and cycling capability with the lower self-discharge process.