Highly Durable and Ultrafast Cycling of Dual-Ion Batteries via In Situ Construction of Cathode–Electrolyte Interphase,Advanced Energy Materials

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Highly Durable and Ultrafast Cycling of Dual-Ion Batteries via In Situ Construction of Cathode–Electrolyte Interphase
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2022-09-16 , DOI: 10.1002/aenm.202202253
Zhenjie Cheng ₁ , Longfei Guo ₁ , Qingyu Dong ₂ , Chunting Wang ₁ , Qian Yao ₁ , Xin Gu ₃ , Jian Yang ₁ , Yitai Qian ₁

Affiliation

Dual-ion batteries have shown promising prospect in energy storage, owing to their low material costs, high power capability, and environmental friendliness. However, graphite as the cathode always suffers from structural damage and electrode/electrolyte interface instability, which greatly deteriorate their electrochemical performance. Here, tris(trimethyl-silyl) phosphite (TMSP) is added as an electrolyte additive to improve the electrochemical performance. TMSP not only scavenges the deleterious species generated by electrolytes, but also produces a thin and uniform cathode–electrolyte interphase layer on graphite. Hence, the electrochemical performance is greatly promoted. In graphite||graphite, the capacity retention is ≈96.8% at 30 °C or 92.5% after 3000 cycles in the presence of TMSP, much better than those without TMSP (62% at 30 °C or 27% after 200 cycles).

中文翻译：

通过原位构建阴极-电解质界面实现双离子电池的高耐久性和超快循环

双离子电池由于其低材料成本、高功率容量和环境友好性在储能方面显示出广阔的前景。然而，作为阴极的石墨总是遭受结构损伤和电极/电解质界面不稳定，这大大降低了它们的电化学性能。在这里，添加三（三甲基甲硅烷基）亚磷酸酯（TMSP）作为电解质添加剂以改善电化学性能。TMSP 不仅能清除电解质产生的有害物质，还能在石墨上产生薄而均匀的阴极-电解质界面层。因此，大大提高了电化学性能。在石墨||石墨中，在 TMSP 存在的情况下，30 °C 下的容量保持率为 ≈96.8% 或 3000 次循环后的容量保持率为 92.5%，

更新日期：2022-09-16

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