A flexible, heat-resistant and self-healable rocking-chair zinc ion microbattery based on MXene-TiS2 (de)intercalation anode

The requirement for rechargeable microbatteries (MBs) continues to increase due to the rapidly development of wearable and integrated electronics. However, the ever-reported mainstream MBs, such as lithium ion MBs, have intrinsic drawbacks of security threats and environmental hazards, and are not suitable as an energy supply component for wearable electronics. Here, a safe and environmentally friendly zinc ion microbattery (ZIMB) based on MXene-TiS2 (de)intercalation anode, multi-walled carbon nanotubes-vanadium dioxide (B) (MWCNTs-VO2 (B)) cathode, zinc sulfate-polyacrylamide (ZnSO4-PAM) hydrogel electrolyte and self-healable polyurethane (PU) protective shell is exploited. The ZIMB exhibit satisfactory electrochemical performance with a capacity of 40.8 mu Ah cm(-2), maximum power density of 32.5 mu Wh cm(-2) and maximum energy density of 1.2 mW cm(-2). In addition, the ZIMB also exhibits the excellent flexibility, thermostability and self-healability, i.e., no significant attenuation in capacity can be observed when the ZIMB is placed on the specific conditions, such as the high bending angle of 150 degrees, high temperature of 100 degrees C, and multiple damage and repair cycles. This study provides a feasible strategy to develop advanced high reliable and stable micro energy storage devices for wearable and integrated electronics.

Automated summary

A safe and environmentally friendly zinc ion microbattery with excellent electrochemical performance and self-healing properties has been developed, making it a feasible strategy for advanced high reliable and stable micro energy storage devices for wearable and integrated electronics.