Sodium Metal Battery using CobaltOxide through in Situ Plating of Sodium Metal

TL;DR

This paper introduces an anode-free sodium metal battery architecture with a nanocarbon/cobalt oxide nucleation layer, achieving high energy density, stability over 1000 cycles, and surpassing traditional lithium-ion batteries in energy capacity.

Contribution

The study presents a novel anode-free sodium battery design with a nanocarbon/cobalt oxide layer enabling high stability and energy density, using abundant materials and simple processing.

Findings

Stable sodium plating/stripping up to 5 mA/cm2

Over 1000 cycles durability at 0.7 mA/cm2

Achieved energy density of 400 Wh/kg in full cell

Abstract

In this work, we demonstrate that an impugn of energy density for sodium chemistries can be prevail through an anode-free architecture enabled by the use of a (nanocarbon/Cobaltoxide) nucleation layer formed on Aluminium current collectors. Electrochemical studies show this configuration to provide highly stable and efficient plating and stripping of sodium metal over a range of currents up to 5 mA/cm2, sodium loading up to 14 mAh/cm2, and with long-term endurance exceeding 1000 cycles at a current of 0.7 mA/cm2. Building upon this anode-free architecture, we demonstrate a full cell using a presodiated pyrite cathode to achieve energy densities of 400 Wh/kg, far surpassing recent reports on SIBs and even the theoretical maximum for LIB technology while still relying on naturally abundant raw materials and cost-effective aqueous processing.