Solid Flexible Coupling Carbon Skeleton and Potassium-Carbonate Dominant Solid Electrolytic Interface Achieved Higher Potassium-Ion Storage

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Potassium ion energy storage devices are highly attractive for large-scale energy storage, but the interconnection of large ions significantly worsens the stability of electrode structures and solid electrolyte interphase (SEI) films, leading to slow reaction dynamics and poor durability. In this article, which is inspired by bubble boxes in our lives, a bubble-like carbon sheet (BPCS) with a porous architecture of rigid-flexible support is rigged on the circuit, exhibits strong structural stability and good layout for volume expansion. Meanwhile, K.S.2CO3· 1.5 h2O-dominated SEI is created by the interfacial transmission behavior of carbonate groups. This k2CO3· 1.5 h2Nanographers not only enhance the stability of SEI, create a stable scaffold, but also create more diffuse routes for K ions. Based on all of the above, the use of BPCS as an anode for potassium ion batteries provides reversible capacities of 463 mAh g.–1 At 50 mA g–1 And 195 mAh c–1 At 10 a.m.–1 With the long life of a bicycle. Assembled BPCS // NPC Potassium ionic hybrid in capacitor with high energy density 167 Wh kg–1 And higher bike ability, with 80.8% power retention per 10,000 cycles, with almost 100% Coulombic efficiency. Even at higher current densities, 10 A c–1The device can supply energy density of 92.9 Wh kg–1 More than 5000 cycles at 9200 W kg energy density–1 Only the cycle disappears by 0.002%, which can challenge lithium-ion hybrid superpowers.