All ceramic cathode composite design and manufacturing towards low interfacial resistance for garnet-based solid-state lithium batteries

Abstract

The critical factors that determine the performance and lifetime of solid-state batteries (SSBs) are driven by the electrode-electrolyte interfaces. The main challenge in fabricating all-oxide cathode composites for garnet-based SSBs...

A High‐Capacity, Long‐Cycling All‐Solid‐State Lithium Battery Enabled by Integrated Cathode/Ultrathin Solid Electrolyte

“…[13] As a consequence, the mass loading of most reported ASSLBs is too low (usually <4 mg cm -2 ) to meet the requirement for practical energy-dense batteries. [14] In addition, due to unfavorable mechanical properties, typical solid electrolytes need to be fabricated to be overly thick as a way of ensuring their integrity under unavoidable stress during conventional cell assembly processes. [9,15] For instance, pure ceramic solid electrolytes are generally too brittle to be produced with a thickness less than 100 µm.…”

Recent advancements in solid electrolytes integrated into all-solid-state 2D and 3D lithium-ion microbatteries

“…147 Similarly, another alternative method to produce LiCoO 2 -LLZO was proposed, where inltration is applied to deposit cathode from metal salts directly in a porous LLZO scaffold at a low processing temperature (700 C), forming a low resistance interface. 148 Further development of these promising processes is required in the future. Another uncommon sol-gel method was applied by Chen et al to successfully deposit thin-lm LLZO, also optimizing such parameters as annealing and number of layers to obtain the highest 1.6 Â 10 À6 S cm À1 ionic conductivity.…”

“…29,44,149,197,198 The other new deposition methods, for instance, for LLZO, are currently under development and optimization as discussed above. 147,148 Up to now, it was observed that the higher e-beam evaporation power (600 W) applied for the LLTO fabrication resulted in a higher ionic conductivity. 190 The morphology alteration usually accompanies the crystallization process of the electrolyte during sintering at high temperatures, since the amorphous phase of the electrolyte transforms to crystalline with higher density.…”

Garnet-type solid electrolyte: Advances of ionic transport performance and its application in all-solid-state batteries

“…Here, the LCO-LLZO and LFP-LLZO were prepared through direct synthesis form metal salts to the oxide cathode in a porous LLZO scaffold. This allowed a good mechanical contact, with no adverse reactions at the interphase, and at low temperature 700 ℃ for synthesis [215]. The LCO-LLZO composite cathode showed a promising discharge capacity of 118 mAh•g −1 (3-4.05 V), with low interfacial resistance of 62 Ω•cm 2 [215].…”

“…To mitigate interface concerns, several approaches have been developed, where employing coating layers on the interface contributes to lowering the resistance and enhancing the lithium mobility at the interface [208][209][210][211][212][213][214][215]. Pulsed laser deposition technology (PLD) has been used to coating the cathode-electrolyte interface to address interface concerns [166,167,184].…”