Hexaazatrinaphthylene-Based Porous Organic Polymers as Organic Cathode Materials for Lithium-Ion Batteries
Hexaazatrinaphthylene-Based Porous Organic Polymers as Organic Cathode Materials for Lithium-Ion Batteries
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DOI：
10.1021/acssuschemeng.7b03165
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发表时间：
2017-12
影响因子：
8.4
通讯作者：
Jinquan Wang;Chunguang Chen;Yugen Zhang
中科院分区：
文献类型：
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作者：
Jinquan Wang;Chunguang Chen;Yugen Zhang
将具有氧化还原活性中心的有机小分子嵌入到合适的多孔有机框架中可以提高离子扩散速率和电子电导率，同时降低其在电解质中的溶解度。用于构建氧化还原活性多孔有机框架的原理不应牺牲理论容量，并且应平衡各种重要参数，例如比容量、循环稳定性、倍率性能以及可扩展性。在此，我们设计了两种新的多孔有机框架作为锂离子电池（LIB）的阴极材料，使用六氮杂三萘（HATN）的核心，表现出高的理论容量。聚合物材料是以一种简便和可扩展的方式合成的，具有不同的结构特征，从刚性共轭框架（HATNPF 1）到柔性非共轭框架（HATNPF 2）。HATNPF聚合物表现出高的比容量（309 mA h g-1）和优异的长期循环稳定性（1200次循环后92%的容量保持率）。
Incorporating small organic molecules with redox-active sites into a suitable porous organic framework could enhance both ion diffusion rate and electronic conductivity while reducing its solubility in electrolytes. Principles for the construction of a redox-active porous organic framework should not sacrifice the theoretical capacity and should balance various important parameters such as specific capacity, cycling stability, rate capability, as well as scalability. Herein, we designed two new porous organic frameworks as cathode materials for lithium-ion batteries (LIBs) using hexaazatrinaphthalene (HATN) cores which show high theoretical capacities. The polymer materials were synthesized in a facile and scalable manner with different structural features ranging from a rigid conjugated framework (HATNPF1) to a flexible nonconjugated framework (HATNPF2). HATNPF polymers demonstrated a high specific capacity (309 mA h g–1), and excellent long-term cycling stability (92% capacity retention after 1200 cycle...