Published in Frontiers in Chemistry
Cation-disordered rock-salt cathodes (DRX) are promising materials that could deliver high capacities (>250 mAh g−1) with Earth abundant elements and materials. However, their electrochemical performances, other than the capacity, should be improved to be competitive cathodes, and many strategies have been introduced to enhance DRXs. Fluorination h...
The applications of Li-ion batteries in the electronics and vehicle industry is increasing at a very rapid pace. This is primarily due to superior properties such as high specific energy storage and power as well as wider operation temperature ranges. Additional potential for improved properties is connected to capacity losses with time and the the...
Published in Frontiers in Chemistry
The pursuit of rapid charging and high energy density in commercial lithium-ion batteries (LIBs) has been one of the priorities in battery research. Silicon-Carbon (Si-C), a possible substitute for graphite as an anode electrode material, is one prospect to achieving this goal. There is a debate as to whether nanoscale or the micron-scale silicon i...
High-nickel single-crystal layered oxide material has become the most promising cathode material for electric vehicle power battery due to its high energy density. However, this material still suffers from structural degradation during cycling and especially the severe interfacial reactions at elevated temperatures that exacerbate irreversible capa...
Published in Journal of The Electrochemical Society
Silicon oxides (SiOx) have been considered as promising alternatives to pure Si in high energy anodes in lithium-ion batteries (LIBs) due to their improved cycling stability. However, their fundamental lithiation mechanism has not yet been systematically investigated, and potential collateral downsides remain unclear. In this work, we report on the...
Uporaba akumulatorjev v zadnjih letih vse bolj narašča. Že dolgo so najboljša izbira za komercialno uporabo Li-ionski akumulatorji, pri katerih se za anodni material še vedno večinoma uporablja grafit, katodni materiali pa so še kar v razvoju. Prvi in komercialno največkrat uporabljen katodni material je LCO (LiCoO2), ki je zaradi visoke cene Co in...
Published in Small (Weinheim an der Bergstrasse, Germany)
Surface modification of cathodes using Ni-rich coating layers prevents bulk and surface degradation for the stable operation of Li-ion batteries at high voltages. However, insulating and dense inorganic coating layers often impede charge transfer and ion diffusion kinetics. In this study, the fabrication of dual functional coating materials using m...
Peer reviewed: True / The pursuit of rapid charging and high energy density in commercial lithium-ion batteries (LIBs) has been one of the priorities in battery research. Silicon-Carbon (Si-C), a possible substitute for graphite as an anode electrode material, is one prospect to achieving this goal. There is a debate as to whether nanoscale or the ...
In the conventional synthesis of layered transition metal oxides the high-temperature process not only causes lithium loss due to evaporation, but also facilitate the inevitable cation mixing of Li+ and Ni2+, resulting in severe shifts in their stoichiometric ratios and thus structure instability. Herein, we report a universal ion-exchange method t...
Published in Journal of The Electrochemical Society
Emphasis on clean energy has led to a widespread focus on lithium-ion batteries. However, a major obstacle is their degradation with several cycles or calendar aging. Battery Management System relies on an essential model-based algorithm to protect the battery from operating outside the safety limit. Thus, this work attempts to answer important res...
