Flexible and safe batteries, coupled with high performance and low cost, constitute a radical advance in portable and wearable electronics, especially considering the fact that these flexible devices are likely to experience more mechanical impacts and potential damage than well-protected rigid batteries. However, flexible lithium ion batteries (LIBs) are vastly limited by their intrinsic safety and cost issues. Here we introduce an extremely safe and wearable solid-state zinc ion battery (ZIB) comprising a novel gelatin and PAM based hierarchical polymer electrolyte (HPE) and an α-MnO₂ nanorod/carbon nanotube (CNT) cathode. Benefiting from the well-designed electrolyte and electrodes, the flexible solid-state ZIB delivers a high areal energy density and power density (6.18 mW h cm⁻² and 148.2 mW cm⁻², respectively), high specific capacity (306 mA h g⁻¹) and excellent cycling stability (97% capacity retention after 1000 cycles at 2772 mA g⁻¹). More importantly, the solid-state ZIB offers a high wearability and an extreme safety performance over conventional flexible LIBs, and performs very well under various severe conditions, such as being greatly cut, bent, hammered, punctured, sewed, washed in water or even put on fire. In addition, flexible ZIBs were integrated in series to power a commercial smart watch, a wearable pulse sensor, and a smart insole, which has been achieved to the best of our knowledge for the first time. These results demonstrate the promising potential of ZIBs in many practical wearable applications and offer a new platform for flexible and wearable energy storage technologies.

中文翻译：

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基于分层结构化聚合物电解质的极其安全且可穿戴的固态锌离子电池†

柔性和安全的电池，再加上高性能和低成本，构成了便携式和可穿戴电子产品的根本性进步，尤其是考虑到以下事实：与具有良好保护的刚性电池相比，这些柔性设备可能遭受更多的机械冲击和潜在的损坏。但是，柔性锂离子电池（LIB）受到其固有的安全性和成本问题的极大限制。下面我们介绍包含新型明胶和PAM基于分层聚合物电解质（HPE）和α-MnO的一个非常安全和可佩戴固态锌离子电池（ZIB）₂纳米棒/碳纳米管（CNT）阴极。得益于精心设计的电解质和电极，柔性固态ZIB可提供较高的面能量密度和功率密度（6.18 mW h cm ^-2）和分别为148.2 mW cm ^-2，高比容量（306 mA hg ^-1）和出色的循环稳定性（在2772 mA g ^-1进行1000次循环后的容量保持率为97％）。更重要的是，固态ZIB较传统的柔性LIB具有更高的耐磨性和极高的安全性能，并且在各种恶劣条件下（例如，被严重切割，弯曲，锤击，刺穿，缝制，在水中清洗甚至什至是洗净甚至什至是苛刻的条件下）表现出色着火了。此外，灵活的ZIB串联集成在一起，可为商业智能手表，可穿戴式脉搏传感器和智能鞋垫提供动力，这是我们所知首次实现的。这些结果证明了ZIB在许多实际可穿戴应用中的有前途的潜力，并为柔性和可穿戴能量存储技术提供了新的平台。