A Quasi‐Solid‐State Flexible Fiber‐Shaped Li–CO2 Battery with Low Overpotential and High Energy Efficiency

• DOI: 10.1002/adma.201804439
• Publication Date: 2018-11-26T06:55:11Z
• Authors: Jingwen Zhou; Xuelian Li; Chao Yang; Yinchuan Li; Kunkun Guo; Jianli Cheng; Dingwang Yuan; Chenhui Song; Jun Lu; Bin Wang
• Keywords: Overpotential

The rapid development of wearable electronics requires a revolution power accessories regarding flexibility and energy density. Li-CO2 battery was recently proposed as novel promising candidate for next-generation energy-storage systems. However, the current batteries usually suffer from difficulties poor stability, low efficiency, leakage liquid electrolyte, few flexible have been reported so far. Herein, quasi-solid-state fiber-shaped with overpotential high by employing ultrafine Mo2 C nanoparticles anchored on carbon nanotube (CNT) cloth freestanding hybrid film cathode, is demonstrated. Due to synergistic effects CNT substrate catalyst, it achieves charge potential below 3.4 V, efficiency ≈80%, can be reversibly discharged charged 40 cycles. Experimental results theoretical simulation show that intermediate discharge product Li2 C2 O4 stabilized via coordinative electrons transfer should responsible reduction overpotential. as-fabricated also keep working normally even under various deformation conditions, giving great becoming an advanced accessory electronics.