Based on the reversible conversion reactions, K₂S_x (5 ≤ x ≤ 6) K₂S₃ K₂S₅, the proposed K–S battery delivered a high discharge capacity of ∼400 mAh g^–1 at 0.1 C-rate with stable cycle retention (94% after 20 cycles) and good rate capability up to 2 C-rate. In addition, instead of an explosive and highly reactive potassium metal electrode, a full cell consisting of an electrochemically potassium-impregnated hard carbon and the K₂S_x (5 ≤ x ≤ 6) catholyte was constructed to demonstrate the feasibility of a safe K–S battery system free of metallic potassium.

中文翻译：

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使用多硫化钾正极液和无金属阳极的高安全性钾硫电池

基于该可逆转化反应，K ₂小号_X（5≤ X ≤6）ķ ₂小号₃ ķ ₂小号₅，所提出的K-硫电池递送的〜400毫安g的高放电容量^-1以0.1C速率具有稳定的循环保持能力（20个循环后为94％），以及良好的速率能力（最高2 C速率）。此外，代替爆炸性和高反应性的钾金属电极，其由电化学钾浸渍的硬碳和K的全电池₂小号_X（5≤ X ≤6）构造了阴极电解液，以证明建立安全的不含金属钾的K–S电池系统的可行性。