Design of a Janus‐Faced Electrode for Highly Stretchable Zinc–Silver Rechargeable Batteries
Design of a Janus‐Faced Electrode for Highly Stretchable Zinc–Silver Rechargeable Batteries
复制标题
DOI：
10.1002/adfm.202004137
复制
发表时间：
2020-08
影响因子：
19
通讯作者：
Woojin Song;Chihyun Hwang;Sangyeop Lee;Minsik Kong;Jonghak Kim;Hyung Keun Park;Hye Bin Son;Gyeongbae Park;Sunghwan Cho;J. Song;Hyoung-Seop Kim;Unyong Jeong;T. Shin;Hyun‐Kon Song;Soojin Park
中科院分区：
文献类型：
--
作者：
Woojin Song;Chihyun Hwang;Sangyeop Lee;Minsik Kong;Jonghak Kim;Hyung Keun Park;Hye Bin Son;Gyeongbae Park;Sunghwan Cho;J. Song;Hyoung-Seop Kim;Unyong Jeong;T. Shin;Hyun‐Kon Song;Soojin Park
开发舒适的可穿戴电子产品面临的最大挑战之一是可拉伸电源的制造，这种电源本质上是安全的，并且可以在机械伸长下保持其电化学性能。基于水基化学的锌银电池由于其高能量/功率密度和安全性而被研究作为可行的电源候选者。然而，此类电池需要新型电极才能保证电池的高弹性和稳定的循环特性。这里，提出了基于Janus面电极的可拉伸锌银可充电电池，Janus面电极是包含阴极和阳极的单个电极。 Janus 面电极表现出良好的机械鲁棒性（200% 应变下 200 次循环），并在伸长状态下保持高电导率（100% 应变下 2.1 Ω）。基于Janus面电极的概念验证可拉伸锌银电池被制造出来，以证明其出色的长期循环性能（200次循环后容量保持率为约90%），这是由于独特的电极配置防止了锌枝晶的短路。此外，所提出的可拉伸锌银电池即使在 200% 的应变下也能提供稳定的电化学性能，同时保持其功能特性。
One of the biggest challenges facing the development of comfortable wearable electronics is the fabrication of stretchable power sources, which are inherently safe and can maintain their electrochemical performance under mechanical elongation. Zinc–silver batteries based on water‐based chemistry have been investigated as viable power supply candidates, owing to their high energy/power density and safety. However, this type of batteries requires a new electrode that can guarantee both high elasticity and stable cycling characteristics of the battery. Here, stretchable zinc–silver rechargeable batteries based on a Janus‐faced electrode, which is a single electrode that comprises a cathode and an anode, are proposed. The Janus‐faced electrode exhibits good mechanical robustness (200 cycles at 200% strain) and retains a high electrical conductivity in the elongated state (2.1 Ω at 100% strain). A proof‐of‐concept stretchable zinc–silver battery based on the Janus‐faced electrode is fabricated to demonstrate the outstanding long‐term cyclability (capacity retentions of ≈90% after 200 cycles), owing to the prevention of short circuit from the zinc dendrite by the unique electrode configuration. Further, the proposed stretchable zinc–silver batteries can deliver a stable electrochemical performance even under a 200% strain while maintaining their functional properties.