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Related Experiment Video

Updated: Jul 2, 2025

$In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries$

In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries

Published on: November 10, 2014

Solution-Based Deep Prelithiation for Lithium-Ion Capacitors with High Energy Density.

Seungyun Jeon^1,2, Sehee Lm¹, Inyeong Kang¹

¹Energy Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, South Korea.

Small (Weinheim an Der Bergstrasse, Germany)

|February 27, 2024

Summary

A novel prelithiation strategy significantly boosts lithium-ion capacitor (LIC) energy density by enhancing amorphous carbon anode initial Coulombic efficiency (ICE). This method doubles activated carbon capacity, enabling high-performance, compact energy storage solutions.

Keywords:

contact‐ion pairs deep prelithiation dual‐ion‐storage electrode balancing lithium‐ion capacitors rocking‐chair mechanism

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Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells

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Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells

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Published on: February 1, 2016

Area of Science:

Electrochemistry
Materials Science
Energy Storage

Background:

Lithium-ion capacitors (LICs) offer high power density and cyclability, surpassing lithium-ion batteries.
Low initial Coulombic efficiency (ICE) in amorphous carbon anodes (hard carbon, soft carbon) limits LIC energy density.
Underutilization of cathode capacity due to poor anode ICE is a key challenge.

Purpose of the Study:

To develop a solution-based deep prelithiation strategy for amorphous carbon anodes in LICs.
To enhance the initial Coulombic efficiency (ICE) of carbon anodes.
To achieve high energy density in LICs through improved electrode balancing.

Main Methods:

Application of a solution-based deep prelithiation technique using a contact-ion pair dominant solution.
Systematic electrode balancing based on increased cathode capacity.
Activation of Li+ cation storage in activated carbon (AC) anodes.

Main Results:

Achieved anode ICE of 150% (over 100%), doubling AC capacity.
Unleashed rocking-chair LIC operation and a dual-ion-storage mechanism.
Reached an energy density of 106.6 Wh kg-1 (AC+SC), a 281% increase compared to non-prelithiated LICs.
Reduced cell thickness by 67% by lowering the cathode-anode mass ratio without capacity loss.

Conclusions:

Solution-based deep chemical prelithiation effectively enhances carbon anode ICE and LIC energy density.
The strategy enables high-energy LICs using transition metal-free, earth-abundant materials.
This approach addresses practical demands for power-intensive applications.