College of Chemistry and Materials Engineering, Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-Efficiency Utilization, National Engineering and Technology Research Center of Wood-based Resources Comprehensive Utilization, and Key Laboratory of Wood Science and Technology of Zhejiang Province, Zhejiang A&F University, Hangzhou, 311300, China.
Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China.
Adv Mater. 2023 Jun;35(26):e2300132. doi: 10.1002/adma.202300132. Epub 2023 May 15.
Although recently developed hybrid zinc (Zn) batteries integrate the benefits of both alkaline Zn and Zn-air batteries, the kinetics of the electrocatalytic oxygen reaction and mass transfer of the electrolyte, which are limited by the mismatched and disordered multiphase reaction's interfacial transfer channels, considerably inhibit the performance of hybrid Zn batteries. In this work, novel, continuously oriented three-phase interfacial channels at the cathode derived from the natural structure of pine wood are developed to address these challenges. A pine wood chip is carbonized and asymmetrically loaded with a hydrophilic active material to achieve the creation of a wood-derived cathode that integrates the active material, current collector, and continuously oriented three-phase reaction interfacial channels, which allows the reaction dynamics to be accelerated. Consequently, the assembled quasi-solid-state hybrid battery performs an extra charge-discharge process beyond that performed by a typical nickel (Ni)-Zn battery, resulting in a wide operating voltage range of 0.6-2.0 V and a superior specific capacity of 656.5 mAh g , in addition to an excellent energy density (644.7 Wh kg ) and good durability. The ≈370% capacity improvement relative to the Ni-Zn battery alone makes the hybrid battery one of the best-performing alkaline Zn batteries.
尽管最近开发的混合锌（Zn）电池集成了碱性 Zn 和 Zn-空气电池的优点，但电催化氧气反应的动力学和电解质的传质，受到不匹配和无序多相反应界面传输通道的限制，极大地抑制了混合 Zn 电池的性能。在这项工作中，开发了新颖的、源自松木天然结构的连续定向三相界面通道，以解决这些挑战。将松木屑碳化并不对称地负载亲水活性材料，以实现集成活性材料、集流器和连续定向三相反应界面通道的木质衍生阴极的创建，从而加速反应动力学。因此，组装的准固态混合电池在典型的镍（Ni）-Zn 电池的基础上进行了额外的充放电循环，具有 0.6-2.0 V 的宽工作电压范围和 656.5 mAh g 的优异比容量，此外还有出色的能量密度（644.7 Wh kg）和良好的耐久性。与单独的 Ni-Zn 电池相比，≈370%的容量提高使混合电池成为性能最佳的碱性 Zn 电池之一。
