Organic carbonyl compounds represent a promising class of electrode materials for secondary batteries; however, the storage mechanism still remains unclear. We take Na2C6H2O4 as an example to unravel the mechanism. It consists of alternating Na-O octahedral inorganic layer and π-stacked benzene organic layer in spatial separation, delivering a high reversible capacity and first coulombic efficiency. The experiment and calculation results reveal that the Na-O inorganic layer provides both Na+ ion transport pathway and storage site, whereas the benzene organic layer provides electron transport pathway and redox center. Our contribution provides a brand-new insight in understanding the storage mechanism in inorganic-organic layered host and opens up a new exciting direction for designing new materials for secondary batteries.
展开▼
机译：有机羰基化合物代表了有前途的二次电池电极材料。但是，存储机制仍然不清楚。我们以Na 2 C 6 H 2 O 4 为例来阐明这一机理。它由交替分布的Na-O八面体无机层和π堆叠的苯有机层组成，具有较高的可逆容量和第一库仑效率。实验和计算结果表明，Na-O无机层同时提供Na + 离子迁移路径和存储位点，而苯有机层同时提供电子传输路径和氧化还原中心。我们的贡献为了解无机有机层状主体中的储存机理提供了全新的见解，并为设计用于二次电池的新材料开辟了新的令人振奋的方向。
展开▼
