Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Fudan University, Shanghai, 200433, China.
Angew Chem Int Ed Engl. 2017 Jul 24;56(31):9126-9130. doi: 10.1002/anie.201705017. Epub 2017 Jun 30.
The utilization of CO in Li-CO batteries is attracting extensive attention. However, the poor rechargeability and low applied current density have remained the Achilles' heel of this energy device. The gel polymer electrolyte (GPE), which is composed of a polymer matrix filled with tetraglyme-based liquid electrolyte, was used to fabricate a rechargeable Li-CO battery with a carbon nanotube-based gas electrode. The discharge product of Li CO formed in the GPE-based Li-CO battery exhibits a particle-shaped morphology with poor crystallinity, which is different from the contiguous polymer-like and crystalline discharge product in conventional Li-CO battery using a liquid electrolyte. Accordingly, the GPE-based battery shows much improved electrochemical performance. The achieved cycle life (60 cycles) and rate capability (maximum applied current density of 500 mA g ) are much higher than most of previous reports, which points a new way to develop high-performance Li-CO batteries.
CO 在锂离子电池中的应用引起了广泛关注。然而，其较差的可再充电性和低应用电流密度仍然是该能量装置的致命弱点。凝胶聚合物电解质（GPE）由聚合物基质填充四甘醇基液体电解质组成，用于制造基于碳纳米管的气体电极的可再充电锂离子电池。在基于 GPE 的 Li-CO 电池中形成的 Li CO 放电产物具有较差结晶度的颗粒状形态，与使用液体电解质的常规 Li-CO 电池中连续的聚合物状和结晶放电产物不同。因此，GPE 基电池表现出了显著改善的电化学性能。所获得的循环寿命（60 次循环）和倍率性能（最大应用电流密度为 500 mA g）远高于大多数先前的报道，为开发高性能 Li-CO 电池指明了新的方向。
