A deep-cycle aqueous zinc-ion battery containingan oxygen-deficient vanadium oxide cathode. Angew. Chem. Int. Ed.132, 2293–2298 (2020). Li, Z. et al. Pencil drawing stable interface for reversible and durable aqueous zinc‐ion batteries. Adv. Funct. Mater.31, 2006495 (2020).
Aqueous zinc ion batteries (ZIBs) have emerged as one of promising candidates for energy storage due to the merits of Zn anodes, such as cost-effectiveness, multivalent feature, and satisfactory stability 11, 12, 13, 14.
During the measurements, the VO 2 -PC cathode pre-intercalated with Zn 2+ is heated by hot water bath while the Zn-G anode is unheated to form a temperature difference (Δ T). It should be noted that the Δ T between anode and cathode is detected by the thermocouple inserted in each chamber.
Notably, the output voltage is dramatically increased with a Δ T of 5 K for PC-based ZTCC, which is mainly caused by the fast desorption of electrolyte ions. When the Δ T reaches 10 K, a relatively stable voltage of ~1.1 V can be obtained.
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