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Updated: Aug 15, 2025

Protocol of Electrochemical Test and Characterization of Aprotic Li-O2 Battery

Protocol of Electrochemical Test and Characterization of Aprotic Li-O2 Battery

Published on: July 12, 2016

Promoting Surface Electric Conductivity for High-Rate LiCoO₂.

Shenyang Xu¹, Xinghua Tan¹, Wangyang Ding¹

¹School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen, 518055, P. R. China.

Angewandte Chemie (International Ed. in English)

|January 2, 2023

Summary

Researchers enhanced lithium-ion battery cathode performance by improving surface conductivity. A novel surface modification on lithium cobalt oxide (LiCoO2) boosted electron transport, leading to superior rate capability and cycling stability.

Keywords:

Effective Voltage Electric Conductivity High Rate LiCoO2 Surface Structure

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Area of Science:

Materials Science
Electrochemistry
Battery Technology

Background:

Cathode materials are crucial for Li-ion batteries, facilitating Li+ diffusion and electron transport.
Research has primarily focused on Li+ diffusion, with less attention paid to electron transport properties.
Improving electron transport is key to enhancing battery rate performance.

Purpose of the Study:

To develop a strategy for enhancing cathode material rate performance by improving surface electric conductivity.
To investigate the effect of surface modification on LiCoO2's electrochemical properties.
To provide a new approach for designing high-rate cathode materials.

Main Methods:

Coherent construction of a disordered rock-salt phase on the surface of LiCoO2.
Electrochemical testing to evaluate rate capability and cycling performance.
Surface characterization and computational simulations to confirm the strategy's universality.

Main Results:

Surface electric conductivity of LiCoO2 was increased by over one magnitude.
Enhanced Li+ extraction/insertion due to increased effective voltage (Veff).
Superior rate capability (154 mAh g-1 at 10C) and excellent cycling performance (93% after 1000 cycles at 10C).

Conclusions:

Promoting surface electric conductivity is an effective strategy to boost battery rate performance.
The developed surface modification technique offers a new avenue for high-rate cathode material development.
Tuning surface electron transport properties is critical for advanced Li-ion battery design.