Dynamic Hydrogen-Bond Network as a Modulator of Bismuth-Antimony Complex Anodes for Self-Healable and Wider Temperature Adaptive Potassium Ion Batteries.

Antimony (Sb)-based anodes are attractive candidates in potassium-ion batteries (PIBs) due to their superior capacities and rational potassium inserting voltages. However, the sluggish kinetics and poor interface compatibility severely hinder practical application. Herein, Bi _0.67 Sb _1.33 S ₃ nanospheres embedded into in situ formed poly(3,4-ethylenedioxythiophene) crosslinked with polythioctic acid (PET@PTA) (Bi _0.67 Sb _1.33 S ₃ /PET@PTA) were elaborately conceptualized with hydrogen bonds exchangeable binding (HBEB) sites. Bi _0.67 Sb _1.33 S ₃ /PET@PTA exhibits notable self-healing ability and wider temperature adaptability. Bi _0.67 Sb _1.33 S ₃ /PET@PTA displays an impressive capacity of 819 mAh g ^-1 at 0.05 A g ^-1 , prominent cycle ability with a 73 % capacity conservation after 500 cycles at 2 A g ^-1 , and high capacity retention of 66 % and 84 % at -40 and 70 °C to that case at room temperature, respectively, for potassium storage. This work provides a new perspective for HBEB sites in maximizing the desirable K ⁺ storage performance.
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