期刊
RSC ADVANCES
卷 5, 期 22, 页码 17096-17103出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra15976d
关键词
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资金
- European Research Council by Starting Grant Innovative Polymers for Energy Storage (iPes) [306250]
- Basque Government through ETORTEK Energigune
- Aquitaine-Euskadi [ANR-10-EQPX-16 XYLOFOREST]
- Spanish Ministry of Education, Culture and Sport
Redox-active polyimide-polyether multi-block copolymers were synthesized by polycondensation reaction of aromatic dianhydrides with alpha-omega-diamino poly(ethylene oxide). Polyimide-b-polyether block copolymers showed microphase separation between a hard-polyimide domain and a soft-polyether domain as observed by Atomic Force Microscopy. The block copolymers were investigated as cathodes for polymer/lithium metal batteries. Polymer cathodes were formulated where the block copolymer had a dual role as active material and binder, with a small amount of carbon black (15 wt%). Naphthalene polyimides showed higher discharge voltages, higher specific capacities as well as better cycling performance, compared to pyromellitic polyimides. The longest PEO blocks resulted in a better performance as electrodes. The best performing naphthalene polyimide-b-PEO2000 presented an excellent value of discharge capacity of 170 mA h g(-1), stable after 100 cycles at a current density of 1Li(+)/5 h and considering the polyimide as the active material. The average discharge plateaus were 2.51 V and 2.37 V vs. Li+/Li.
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