Designing low-strain cathode materials for long-life all-solid-state batteries

Abstract

All solid-state batteries (ASSBs) represent the next generation of technology, offering tremendous potential in safety and energy density. However, successfully integrating high-capacity cathode materials without compromising long-term stability remains a...

Tunable Conversion to Spinel–Layered LiMnO2 via Protonated Mn3O4 for Ultrastable Lithium-Ion Batteries

“…As a result of their highly abundant manganese source, low cost, and large theoretical capacity, lithium manganese-rich oxides (LMO) are considered as more sustainable and economical cathode materials for lithium-ion batteries (LIBs). − However, the cycle performances of LMO are usually limited to less than 100 cycles owing to the cooperative Jahn–Teller effect associated with Mn 3+ , hence resulting in severe structural degradation and Mn ion dissolution. − Until now, great efforts have been devoted to alleviating the Jahn–Teller distortion, including cationic substitution , and interface engineering. − These strategies could stabilize the original structure, however, which lost the cost advantage and retained irreversible phase transitions associated with Jahn–Teller distortion during Li intercalation in LMO. In our previous work, spinel–layered LiMnO 2 with an orthogonal interfacial orbital ordering design via an in situ electrochemical conversion from Mn 3 O 4 nanoarrays could significantly alleviate the cooperative Jahn–Teller distortion of Mn 3+ .…”