# Solid Thin-Film Battery Using a Densely Packed LiNi0.5Mn1.5O4 Crystal Layer

## TL;DR

Researchers developed a high-performance solid-state battery using a densely packed LiNi0.5Mn1.5O4 layer, improving battery efficiency and paving the way for better energy storage.

## Contribution

The study demonstrates stable cycling in a solid thin-film battery using densely packed LiNi0.5Mn1.5O4, significantly reducing interface resistance.

## Key findings

- Annealing the battery reduced interface resistance by an order of magnitude.
- Densely packed LiNi0.5Mn1.5O4 layers enable stable cycling in solid-state batteries.
- The work provides a foundation for all-solid-state Li batteries with high energy density.

## Abstract

A 5 V-class LiNi0.5Mn1.5O4 (LNMO)
positive electrode has excellent potential for increasing the energy
density of solid-state Li batteries. In this study, we report the
stable cycling of a solid thin-film Li battery using a densely packed
LNMO crystal layer, which has a high packing density and a well-developed
crystal plane. Annealing a battery reduces the resistance at the interface
of a Li3PO4 solid electrolyte and LNMO for an
order of magnitude, from 5.3 × 102 to 5.7 × 101 Ωcm2, enhancing the battery performance.
This paper lays the groundwork for developing all-solid-state Li batteries
using densely packed LNMO layers.