Bio-catalyzed oxidation self-charging zinc-polymer batteries

• 成果类型: Article
• 署名作者: Pan, Jun; Liu, Yanhong; Yang, Jian; Wu, Jiawen; Fan, Hong Jin
• 署名单位: Nanyang Technological University; Shandong University
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-15197
• DOI: 10.1073/pnas.2312870121
• 发表日期: 2024-02-20
• 关键词: air battery; electrolyte

摘要

Oxidation self- charging batteries have emerged with the demand for powering electronic devices around the clock. The low efficiency of self- charging has been the key challenge at present. Here, a more efficient autoxidation self- charging mechanism is realized by introducing hemoglobin (Hb) as a positive electrode additive in the polyaniline (PANI)-zinc battery system. The heme acts as a catalyst that reduces the energy barrier of the autoxidation reaction by regulating the charge and spin state of O2. To realize self- charging, the adsorbed O2 molecules capture electrons of the reduced (discharged state) PANI, leading to the desorption of zinc ions and the oxidation of PANI to complete self- charging. The battery can discharge for 12 min (0.5 C) after 50 self- charging/discharge cycles, while there is nearly no discharge capacity in the absence of Hb. This biology- inspired electronic regulation strategy may inspire new ideas to boost the performance of self- charging batteries.