π-d Conjugated Coordination Polymer Bearing Triple Redox-Active Centers Enables High-Capacity and Stable Rechargeable Aluminum Batteries
π-d Conjugated Coordination Polymer Bearing Triple Redox-Active Centers Enables High-Capacity and Stable Rechargeable Aluminum Batteries
研究概述
以π–d共轭Cu-TADD配位聚合物作为铝电池正极，耦合羰基、亚胺及Cu²⁺/Cu⁺三类氧化还原中心，实现205 mAh/g放电容量。共轭提高导电性，配位键增强结构稳定性，循环寿命6000次；储能涉及AlCl2⁺与活性中心可逆配位/解离。
谱图与表征信息
Figure 2. Structural and thermal stability characterizations. (a) XRD patterns of TADD, Ni-TADD, Cu-TADD, and Zn-TADD; (b) XANES spectra of Cu-TADD; (c) EPR spectra; and (d) TG curves of TADD, Ni-TADD, Cu-TADD, and Zn-TADD.
Figure 5. Charge storage mechanism of the Cu-TADD cathode. (a) Ex situ XANES spectra and (b) ex situ FTIR spectra at different voltages. EDS spectra after (c) discharging to 0.1 V and (d) charging to 2.2 V of Cu-TADD. (e) Schematic charge storage mechanism of Cu-TADD.