Research on new stabilized electrolytes for AG10 battery has made series progress

　　Metal zinc is rich in resources and has high specific energy. As a negative electrode, it has significant promotion advantages in zinc-manganese, zinc-nickel, zinc-silver and zinc-air batteries. However, metallic zinc has serious corrosion and dendrite problems in traditional aqueous electrolytes, which greatly limits the electrochemical performance and cycle stability of AG10 battery.

　　In order to effectively improve the stability of the zinc anode, a scientific research team led by Liu Yu, a researcher at the Shanghai Institute of Ceramics of the Chinese Academy of Sciences, carried out a series of work and developed a self-supporting gelatin electrolyte separator with high stability and flexibility. This electrolyte has unique thermal reversibility and excellent inorganic salt compatibility. By building a stable electrode-electrolyte interface, the corrosion degree of the zinc anode is significantly reduced, and the cycle stability of the symmetrical battery is improved (0.2mAcm-2 stable cycle for 800h) without obvious dendrite formation. The unique structural design makes the battery flexible and stable against external stimulation. Furthermore, based on the unique inorganic salt enhancement effect of gelatin, the gelatin electrolyte treated in a high-concentration electrolyte is dehydrated, strong hydrophobic interactions are formed between the molecular chains, and the thermal stability and mechanical properties of the electrolyte are significantly enhanced, achieving the current results. Self-supporting solid electrolyte separators for aqueous AG10 battery with the best mechanical properties reported. The symmetrical battery can cycle stably for 400h at current density up to 5mAcm-2. At the same time, the excellent mechanical properties also improve the safety of the battery and expand its application in the field of flexible batteries. Relevant results were published in Journal of Materials Chemistry A (2018, DOI: 10.1039/c8ta08314b) and Journal of Materials Chemistry A (2019, DOI: 10.1039/c9ta07218g). Among them, the results of the article published in 2019 were selected as the cover of the journal. The first author of the relevant work is Han, a doctoral student. strange.

　　The team also designed a new solid-water electrolyte system in which the gas-phase nanosilica (FS) complexes water molecules through surface active groups, inhibiting water corrosion of the zinc anode; and as an inorganic filler, Enhance the separator's resistance to dendrite puncture. The addition of non-ionic surfactant (FMEE) reduces the activation energy of Zn2+ deposition, synergizes with silica to significantly inhibit the growth of Zn dendrites, and at the same time improves the Coulombic efficiency. Relevant work results were published in the International Electrochemical Professional Journal Journal of The Electrochemical Society (2019, DOI: 10.1149/2.1031906jes). The first author is Huang Jiaqi, a doctoral student.

　　The team further developed a highly active cathode material that matches the aforementioned results and achieved cycle stability of up to 10,000 cycles at a rate of 10C. The relevant work has been accepted by the Journal of Power Sources. The first author is Liu Yunzhao, a doctoral student.

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