A High-Performance Solid-State Secondary Battery Using a Triple-Phase-Interface Anode Displaying Excellent Capacity and Electrochemical Kinetics
A High-Performance Solid-State Secondary Battery Using a Triple-Phase-Interface Anode Displaying Excellent Capacity and Electrochemical Kinetics
研究概述
将CoS、Co9S8和SnS三相界面嵌入氮掺杂碳，增强界面电场及电子/离子输运，用作固态钠电负极。与Na3PS4兼容，0.5 A/g循环120次后容量441 mAh/g，5 A/g下348.7 mAh/g；还验证高温及磷酸钒钠全电池性能。
谱图与表征信息
FIGURE 1 SEM images of (a) CoSn(OH)6, (b) CoS/Co9S8/SnS@NC. (c) TEM and (d) HRTEM photographs and (e) refined XRD pattern of CoS/Co9S8/SnS@NC. (f) Co K-edge X-ray adsorption near edge structure (XANES) spectra, (g) Co k-edge k3-weighted FT-EXAFS spectra of CoS/Co9S8/SnS@NC and standard samples. (h) Wavelet transform (WT) of CoS/Co9S8/SnS@NC.