Interfacial Architecture for Extra Li+ Storage in All-Solid-State Lithium Batteries

Abstract

The performance of nanocomposite electrodes prepared by controlled ball-milling of TiS2 and a Li2S–P2S5 solid electrolyte (SE) for all-solid-state lithium batteries is investigated, focusing on the evolution of the microstructure. Compared to the manually mixed electrodes, the ball-milled electrodes exhibit abnormally increased first-charge capacities of 416 mA h g−1 and 837 mA h g−1 in the voltage ranges 1.5–3.0 V and 1.0–3.0 V, respectively, at 50 mA g−1 and 30°C. The ball-milled electrodes also show excellent capacity retention of 95% in the 1.5–3.0 V range after 60 cycles as compared to the manually mixed electrodes. More importantly, a variety of characterization techniques show that the origin of the extra Li+ storage is associated with an amorphous Li–Ti–P–S phase formed during the controlled ball-milling process.

Comparative Study of TiS 2 /Li-In All-Solid-State Lithium Batteries Using Glass-Ceramic Li 3 PS 4 and Li 10 GeP 2 S 12 Solid Electrolytes

“…The presence of minor impurities, seen in the XRD pattern, may also contribute the decrease in conductivity. For this study, TiS 2 was chosen as the cathode material because of its metallic properties and highly reversible reaction with Li [12,24,25]. Importantly, a mild operating voltage of ∼2.1 V (vs. Li/Li + ) lies within the electrochemical window of sulfide SEs [17,20].…”

“…Then, the cell was allowed to rest for approximately 3 h before the EIS measurements. In order to measure Li + ion conductivity of the TiS 2 /SE electrode, specially designed electron-blocking symmetric cell of Li/SE/electrode/SE/Li by DC and AC methods [25].…”

Microscale characterization of coupled degradation mechanism of graded materials in lithium batteries of electric vehicles

“…Shock pressure at the interface changes to reach equilibrium, which can be analyzed by way of impedance matching. Therefore, the shock pressure and particle velocity for materials at nanometer scale is continuous [62,64,66,[133][134][135].…”

Electromagnetic effects model and design of energy systems for lithium batteries with gradient structure in sustainable energy electric vehicles

“…Existing tests only measure the electrical polarization induced by a single magnetic field or the magnetization induced by an electric field [37]. Very few studies report on the gradient structure under magnetic-electric-temperature coupled fields because of the difficulty in loading and testing of different fields on a single platform [38,39].…”