All-solid-state sponge-like squeezable zinc-air battery
All-solid-state sponge-like squeezable zinc-air battery
复制标题
全固态海绵状可挤压锌空气电池
DOI：
10.1016/j.ensm.2019.04.036
复制
发表时间：
2019
影响因子：
20.4
通讯作者：
John Wang
中科院分区：
文献类型：
--
作者：
Zhenghui Pan;Jie Yang;Wenjie Zang;Zongkui Kou;Cun Wang;Xiaoyu Ding;Cao Guan;Ting Xiong;Hao Chen;Qichong Zhang;Yaotang Zhong;Meinan Liu;Lidan Xing;Yongcai Qiu;Weishan Li;Chenlin Yan;Yuegang Zhang;John Wang
可挤压能量存储装置，包括具有高理论能量密度的那些锌空气电池（ZAB），对于能够适应大应变而没有电化学性能和可靠性的显著损失的柔性和可穿戴电子器件是非常感兴趣的。然而，ZAB在这种柔性环境中的性能受到空气电极中氧还原反应（ORR）/析氧反应（OER）的动力学缓慢速率的显著阻碍，特别是在由于缺乏高活性和可挤压的电极材料而产生大变形时。在碱性介质中，我们将Fe掺杂的Co 3 O 4纳米线直接沉积在氮掺杂的泡沫碳（Fe-Co 3 O 4 NWs @NCFs）上，制备了具有上级双功能催化性能（Ej=10（OER）-E1/2（ORR）= 0.61 V）的新型电极。作为概念验证应用，用Fe-Co 3 O 4 NWs @ NCF作为空气电极和Zn NSs@ NCF组装高度可压缩的全固态ZAB（在NCF上电沉积的Zn纳米片）作为Zn电极，其显示出具有高开路电位（1.51 V）、低放电/充电电压间隙（在5 mA cm-2下为0.657 V）和大功率密度（260 mW cm-2）。此外，ZAB的强大挤压能力（高达60%的应变）和机械耐久性能（通过500次重复压缩测试）使其成为耐压缩电子产品的潜在电源。
Squeezable energy storage devices, including those zinc air batteries (ZABs) of high theoretical energy densities, are of great interest for flexible and wearable electronics that are able to accommodate large strains without remarkable loss in electrochemical performance and reliability. However, the performance of ZABs in such flexible environment is significantly hindered by the kinetically sluggish rate of oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) in the air electrode, especially upon large deformation due to the lack of highly active and squeezable electrode materials. Herein, we present an advanced electrode by directly depositing Fe-doped Co3O4nanowires on nitrogen-doped carbon foams (Fe-Co3O4NWs@NCFs) with superior bifunctional catalytic performance (Ej=10(OER) -E1/2(ORR) = 0.61 V) in an alkaline medium. As a proof-of-concept application, a highly squeezable all-solid-state ZAB was assembled with Fe-Co3O4NWs@NCFs as the air electrode and Zn NSs@NCFs (electrodeposited Zn nanosheets on NCFs) as the Zn electrode, which is shown to possess a high open circuit potential (1.51 V), a low discharge/charge voltage gap (0.657 V at 5 mA cm−2) and a large power density (260 mW cm−2). Furthermore, the great squeeze-ability (up to 60% strain) and mechanical endurance properties (tested by repetitive compressions for 500 cycles) in particular make the ZAB a potentially promising power source for compression-tolerant electronics.