K-Ion Batteries |

Impact of Graphite Properties and Electrode Formulation on Potassium-Ion Battery Performance and Storage Mechanisms

Thu, 30 Oct 2025 00:00:00 +0000

Impact of Milling Conditions on Hard and Soft Carbon Properties and Performance in Potassium-Ion Batteries

Thu, 04 Apr 2024 00:00:00 +0000

Nonaqueous potassium-ion full-cells: Mapping the progress and identifying missing puzzle pieces

Wed, 24 Jan 2024 00:00:00 +0000

A novel K-ion KVPO4F0.5O0.5/graphite full cell: Correlation between XPS SEI studies and electrochemical testing results

Wed, 25 Oct 2023 00:00:00 +0000

Impact of Hard Carbon Properties on Their Performance in Potassium-Ion Batteries

Tue, 02 May 2023 00:00:00 +0000

Toward Highly Reliable Potassium-Ion Half and Full Coin Cells

Wed, 15 Mar 2023 00:00:00 +0000

Optimized electrode formulation for enhanced performance of graphite in K-ion batteries

Thu, 01 Sep 2022 00:00:00 +0000

Impact of the Salt Anion on K Metal Reactivity in EC/DEC Studied Using GC and XPS Analysis

Tue, 23 Nov 2021 00:00:00 +0000

XPS Analysis of K‑based Reference Compounds to Allow Reliable Studies of Solid Electrolyte Interphase in K‑ion Batteries

Wed, 29 Sep 2021 00:00:00 +0000

Self-supported carbon nanofibers as negative electrodes for K-ion batteries: Performance and mechanism

Tue, 01 Dec 2020 00:00:00 +0000

Electrochemical Redox Processes Involved in Carbon-Coated KVPO4F for High Voltage K-Ion Batteries Revealed by XPS Analysis

Thu, 01 Oct 2020 00:00:00 +0000

TROPIC 🔋 2019-2023

Tue, 01 Oct 2019 00:00:00 +0000

🔍 Overview

This project was an academic collaboration (ICGM, ICMCB and IPREM) that was built notably on the . It was funded by the French National Research Agency and led by L. Monconduit. The aim was to develop alternative K-ion batteries with >90 Wh/kg while (i) adressing the K metal reactivity, (ii) selecting the promising active materials and optimizing the corresponding electrodes formulation and (iii) assembling reliable and optimized full cells with a focus on the aging understanding.
Two PhD were funded, R. Wernert and B. Larhrib. The key findinds decrisbed after refer to B. Larhrib’s thesis entitled “From Electrode Design to K-Ion Full Cell Optimization: Electrochemical Performance and Interface Phenomena Investigations”.

🎯 Key Findings

Optimized graphite electrode formulation with…..btention of thick graphite electrodes (8 mg/cm² vs. 1–2 mg/cm² in the literature).
Full cells assemlby methodology …
First full graphite//KVPO4F cells with 50 Wh/kg energy density (device level).
aging….

👤 My Contributions

Writing (25%), WP leader (graphite electrode formulation, full-cells assembly, electrolyte formulation and aging mechanism using XPS).
Co-direction of 🎓 B. Larhrib’s PhD thesis (85%).
Download B. Larhrib PhD thesis - PDF (en)

📢 Communication

📄 7 publications
🎤 2 international conferences

Paving the Way for K-Ion Batteries: Role of Electrolyte Reactivity through the Example of Sb-Based Electrodes

Fri, 28 Sep 2018 00:00:00 +0000

K-ion Genesis 🔋2018-2021

Mon, 01 Jan 2018 00:00:00 +0000

🔍 Overview

This K-ion battery research project was initiated through a preliminary study, in collaboration with ICGM (L. Monconduit / L. Stievano) and LRCS (G. Gachot) within the RS2E network.
In parallel, a PhD funding was secure by L. Caracciolo via E2S-UPPA I-SITE, entitled: “Study of K-ion batteries: redox processes and interfacial phenomena”.

🎯 Key Findings

Preliminary study:

Detrimental interactions (cross-talks) between electrodes were highlighted. In other words, species formed on the K-metal surface migrate and deposit at the working electrode surface whatever the electrode/electrolyte combination was thus preventing SEI study in half-cells in K-ion batteries.

PhD results:

XPS was used on KVPO4FxO1-x and revealed a high reversibility of the redox processes although the K+ extraction (and insertion) from x = 0.5 to 0 was hindered, possibly by structural constraints while electrolyte degradation occurred mostly above 4.5V.
An unique XPS database was created with K-based SEI reference compounds compared to Li and Na ones.
XPS (SEIs) and GC/MS/FTIR (Gases) analysis were combined for the first time to determine the complete degradation pathways of KPF6 and KFSI in EC:DEC in contact with K-metal and compared to LiPF6 in EC:DEC in contact with Li metal.

👤 My Contributions

The XPS - GC/MS/FTIR combination that for the time allowed obtening full degradation mechanisms of electrolytes.
Co-direction of 🎓 L. Caracciolo’s PhD thesis (>75%).
Download L. Caracciolo PhD thesis - PDF (fr-en)

📢 Communication

📄 5 publications
🎤 3 international conferences

🚀 Next Steps

K-ion Genesis outcomes helped built the