Alkali-ion batteries,including potassium-ion batter-ies,lithium-ion batteries,and sodium-ion batteries are important energy storage devices;however,with the cation size increased,there exists a great challenge for an ...Alkali-ion batteries,including potassium-ion batter-ies,lithium-ion batteries,and sodium-ion batteries are important energy storage devices;however,with the cation size increased,there exists a great challenge for an inorganic electrode material to accommodate the different properties of the alkali-ion.Herein,as a proof-of-concept experiment,an imine-rich poly(o-phenylenediamine)(PoPD)is syn-thesized through a rational controllable oxidization.Due to the abundance of active sites and ladder-conjugated structure,PoPD in the optimized oxida-tion state endows alkali-ion batteries with a stable cyclability at high capacity.The highly reversible redox performance of PoPD with alkali-ions is verified by theoretical calculations and demonstrat-ed as a trifunctional electrode material(537 and 307 mAh·g^(−1) for Li and Na storage capacity after 300 cycles,respectively),especially for successful application in potassium storage(450 mAh·g^(−1) after 205 cycles),and provides compelling evidence for the wide application of organic electrode materials.展开更多
基金This work was financially supported by the National Natural Science Foundation of China(21725103and51472232),JCKY2016130B010,Jilin Province Science and Technolo-gy Development Plan Funding Project(20180101203JC and 20160101289JC)Changchun Science and Tech-nologyDevelopmentPlanFundingProject(18DY012).
文摘Alkali-ion batteries,including potassium-ion batter-ies,lithium-ion batteries,and sodium-ion batteries are important energy storage devices;however,with the cation size increased,there exists a great challenge for an inorganic electrode material to accommodate the different properties of the alkali-ion.Herein,as a proof-of-concept experiment,an imine-rich poly(o-phenylenediamine)(PoPD)is syn-thesized through a rational controllable oxidization.Due to the abundance of active sites and ladder-conjugated structure,PoPD in the optimized oxida-tion state endows alkali-ion batteries with a stable cyclability at high capacity.The highly reversible redox performance of PoPD with alkali-ions is verified by theoretical calculations and demonstrat-ed as a trifunctional electrode material(537 and 307 mAh·g^(−1) for Li and Na storage capacity after 300 cycles,respectively),especially for successful application in potassium storage(450 mAh·g^(−1) after 205 cycles),and provides compelling evidence for the wide application of organic electrode materials.
