Liquid-free all-solid-state Zn batteries and encapsulation-free flexible batteries enabled by in-situ constructed polymer electrolyte.

Liquid-free all-solid-state Zn batteries and encapsulation-free flexible batteries enabled by in-situ constructed polymer electrolyte.
Angew Chem Int Ed Engl. 2020 Sep 16;:
Authors: Ma L, Chen S, Li X, Chen A, Dong B, Zhi C
Abstract
Zn batteries are usually considered as safe aqueous system promising for flexible batteries. On the other hand, any liquids, including water, being encapsulated in a deformable battery may result in potential troubles. Developing completely liquid-free all-solid-state Zn batteries needs high-quality solid-state electrolytes (SSEs). Here, we demonstrate the in-situ polymerized amorphous solid poly(1,3-dioxolane) electrolytes, which shows high Zn ion conductivity of 19.6 mS ×cm -1 at room temperature, low interfacial impedance, highly reversible Zn plating/stripping over 1800 h cycles, uniform & dendrite-free Zn deposition, and non-dry properties. The in-plane interdigital-structure device with electrolyte completely exposed to open atmosphere can be stably operated for over 30 days almost without weight loss and electrochemical performance decay. Furthermore, the sandwich-structure device can normally operate over 40 min under fire condition. Meanwhile, the interfacial impedance and the capacity using in-situ-formed SPEs retain almost unchanged after various bending tests, a key criterion for flexible/wearable devices. Our study demonstrates an approach for SSEs that fulfill the requirement of no liqu...

Source: Angewandte Chemie - September 15, 2020 Category: Chemistry Authors: Ma L, Chen S, Li X, Chen A, Dong B, Zhi C Tags: Angew Chem Int Ed Engl Source Type: research