Liu Mengmeng, Kong Dezhi, Chu Ningning, Zhi Gang, Wang Hui, Xu Tingting, Wang Xinchang, Li Xinjian, Zhang Zhuangfei, Yang Hui Ying, Wang Ye
Key Laboratory of Material Physics, Ministry of Education, School of Physics, Zhengzhou University, Zhengzhou, 450052, China.
Pillar of Engineering Product Development, Singapore University of Technology and Design, 8 Somapah Road, Singapore, 487372, Singapore.
Adv Sci (Weinh). 2025 Jun;12(22):e2417638. doi: 10.1002/advs.202417638. Epub 2025 Mar 31.
Sodium metal anode holds great potential for high energy density sodium batteries. However, its practical utilization is impeded by significant volume change and uncontrolled dendrite growth. To tackle these issues, a three-dimensional (3D) hierarchical porous sodiophilic reduced graphene oxide/diamane (rGO/diamane) microlattice aerogel is constructed by a direct ink writing (DIW) 3D printing (3DP) method. The molten Na is diffused into the rGO/diamane host to form Na@rGO/diamane anode, which can deliver an ultra-high capacity of 78.60 mAh cm (1090.94 mAh g). Benefiting from uniform ion distribution and homogeneously distributed sodiophilic diamane enabled dendrite-free deposition morphology, the Na@rGO/diamane anodes exhibit a long cycle-life of over 7200 h at 1 mA cm with 1 mAh cm. Furthermore, the Na@rGO/diamane anode also enhances the long-term stability at an elevated operation temperature of 60 °C, sustaining a prolonged lifespan of 400 h at 1 mA cm with 1 mAh cm. Notably, when integrated with the NaV(PO)@carbon (NVP@C) cathode and Na@rGO/diamane anode, the full cell delivers sustained longevity, maintaining a lifespan of over 2000 cycles with a capacity retention rate of 95.72%. This work sheds new insights into the application of diamane for the development of stable and high-performance sodium metal batteries.
钠金属阳极在高能量密度钠电池方面具有巨大潜力。然而，其实际应用受到显著的体积变化和不受控制的枝晶生长的阻碍。为了解决这些问题，通过直接墨水书写（DIW）3D打印（3DP）方法构建了三维（3D）分级多孔亲钠还原氧化石墨烯/二胺（rGO/二胺）微晶格气凝胶。熔融的钠扩散到rGO/二胺主体中形成Na@rGO/二胺阳极，其可提供78.60 mAh cm（1090.94 mAh g）的超高容量。得益于均匀的离子分布和均匀分布的亲钠二胺，实现了无枝晶沉积形态，Na@rGO/二胺阳极在1 mA cm和1 mAh cm的条件下表现出超过7200小时的长循环寿命。此外，Na@rGO/二胺阳极在60°C的升高工作温度下也提高了长期稳定性，在1 mA cm和1 mAh cm的条件下保持了400小时的延长寿命。值得注意的是，当与NaV(PO)@碳（NVP@C）阴极和Na@rGO/二胺阳极集成时，全电池具有持续的长寿命，保持超过2000次循环的寿命，容量保持率为95.72%。这项工作为二胺在稳定和高性能钠金属电池开发中的应用提供了新的见解。
