Advanced biocarbon-based anodes and high-voltage LNMO cathodes for next-generation lithium-ion batteries
Thesis event information
Date and time of the thesis defence
Place of the thesis defence
L5, University of Oulu, Linnanmaa campus
Topic of the dissertation
Advanced biocarbon-based anodes and high-voltage LNMO cathodes for next-generation lithium-ion batteries
Doctoral candidate
Master of Science Yan Lin
Faculty and unit
University of Oulu Graduate School, Faculty of Technology, Sustainable Chemistry
Subject of study
Chemistry
Opponent
Professor Ann Mari Svensson, Norwegian University of Science and Technology
Custos
Docent Tao Hu, University of Oulu
Advanced biocarbon-based anodes and high-voltage LNMO cathodes for next-generation lithium-ion batteries
Lithium-ion batteries are widely used in electric vehicles and renewable energy storage systems due to their high energy density and efficiency. However, challenges remain in improving their sustainability, lifespan, and performance, particularly in the design of electrode materials.
This thesis explores the development of advanced anode and cathode materials through sustainable material fabrications and precise structural control to enhance the electrochemical performance of lithium-ion batteries.
On the anode side, two novel carbon-based materials were developed from cabbage leaves, a renewable biomass. These biocarbon frameworks offer mechanical flexibility and good conductivity, which improve charge transport and structural integrity during cycling, showing enhanced capacity and cycling stability. On the cathode side, the high-voltage material LiNi0.5Mn1.5O4 (LNMO) was investigated. This cobalt-free compound operates at around 4.7 V, offering higher energy density, but tends to degrade over time during charge/discharge process. By carefully adjusting how LNMO is systhesized, including changes in the atomic structure and chemical composition, the material’s performance and durability were significantly improved.
In conclusion, this work shows how sustainable materials and structural engineering at atomic level can be combined to creat high-performance, long-lasting lithium-ion battery electrodes, contributing to greener and more efficient energy storage technologies.
This thesis explores the development of advanced anode and cathode materials through sustainable material fabrications and precise structural control to enhance the electrochemical performance of lithium-ion batteries.
On the anode side, two novel carbon-based materials were developed from cabbage leaves, a renewable biomass. These biocarbon frameworks offer mechanical flexibility and good conductivity, which improve charge transport and structural integrity during cycling, showing enhanced capacity and cycling stability. On the cathode side, the high-voltage material LiNi0.5Mn1.5O4 (LNMO) was investigated. This cobalt-free compound operates at around 4.7 V, offering higher energy density, but tends to degrade over time during charge/discharge process. By carefully adjusting how LNMO is systhesized, including changes in the atomic structure and chemical composition, the material’s performance and durability were significantly improved.
In conclusion, this work shows how sustainable materials and structural engineering at atomic level can be combined to creat high-performance, long-lasting lithium-ion battery electrodes, contributing to greener and more efficient energy storage technologies.
Created 8.12.2025 | Updated 10.12.2025