Angewandte Chemie · 2023 · 27 citations · 47 references
Natural SciencesMaterials EngineeringMaterials ScienceElectrochemical EngineeringElectrochemistryEnergy MaterialsBattery MaterialsElectrochemical CellsElectrochemical Energy StorageEnergy StorageEnergy Storage MaterialsSeparator MaterialsCellulose Composite MaterialsComposite SeparatorsEnergy Storage SystemsIon TransportIon Transport MechanismsRational DesignSodium-ion BatteriesTransference Number
Abstract Sodium‐ion batteries (SIBs) have great potential for large‐scale energy storage. Cellulose is an attractive material for sustainable separators, but some key issues still exist affecting its application. Herein, a cellulose‐based composite separator (CP@PPC) was prepared by immersion curing of cellulose‐based separators (CP) with poly(propylene carbonate) (PPC). With the assistance of PPC, the CP@PPC separator is able to operate the cell stably at high voltages (up to 4.95 V). The “pore‐hopping” ion transport mechanism in CP@PPC opens up extra Na + migration paths, resulting in a high Na + transference number (0.613). The separator can also tolerate folding, bending and extreme temperature under certain circumstances. Full cells with CP@PPC reveal one‐up capacity retention (96.97 %) at 2C after 500 cycles compared to cells with CP. The mechanism highlights the merits of electrolyte analogs in separator modification, making a rational design for durable devices in advanced energy storage systems.
47
Jianjun Zhang, Jianghui Zhao, Liping Yue et al. · Advanced Energy Materials · 2015 · 630 citations
Natural Sciences, Materials Engineering, Materials Science +17
Copper-coordinated cellulose ion conductors for solid-state batteries
Chunpeng Yang, Qisheng Wu, Weiqi Xie et al. · Nature · 2021 · 622 citations