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@article{Singh:2026:10.1002/bte2.70159,
author = {Singh, M and Myllym盲ki, S and Halonen, N and Bismarck, A and Crispin, R and Khan, Z and Oksman, K},
doi = {10.1002/bte2.70159},
journal = {Battery Energy},
title = {FreeStanding LigninDerived Hard Carbon Anodes for Sustainable PotassiumIon Batteries},
url = {http://dx.doi.org/10.1002/bte2.70159},
volume = {5},
year = {2026}
}
TY - JOUR
AB - <jats:title>ABSTRACT</jats:title> <jats:p> Potassiumion batteries (KIBs) require anode materials that combine high reversible capacity with minimal firstcycle losses associated with solid electrolyte interphase (SEI) formation. Biomassderived hard carbons (HCs) are promising candidates, although their Kstorage behavior is strongly influenced by carbon structure, surface chemistry, and pore architecture. Here, industrial LignoBoost lignin was converted into binderfree, freestanding HC nanofiber mats by electrospinning followed by carbonization at 800°C–1400°C (HC8HC14), enabling evaluation of their intrinsic Kstorage behavior without inactive binder or conductive additives. Temperaturedependent structural and chemical evolution was characterized using Raman spectroscopy and Xray photoelectron spectroscopy and correlated with specific surface area (331–1328 m <jats:sup>2</jats:sup> g <jats:sup>−1</jats:sup> ), electrical conductivity (2.4–14 S cm <jats:sup>−1</jats:sup> ) and electrochemical performance. All HC mats exhibited the characteristic sloping and lowvoltage plateau regions of K storage. Increasing the carbonization temperature progressively decreased the sloping capacity while enhancing plateau contribution. HC14 exhibited the best overall performance, delivering a reversible capacity of 369 mAh g <jats:sup>−1</jats:sup> with an initial coulombic efficiency of 69%. This improvement is associated with increased sp <jats:sup>2</jats:sup> rich conjugation and development of nanocrystalline aromatic domains and together with reduced oxygencontaining functionalities and resi
AU - Singh,M
AU - Myllym盲ki,S
AU - Halonen,N
AU - Bismarck,A
AU - Crispin,R
AU - Khan,Z
AU - Oksman,K
DO - 10.1002/bte2.70159
PY - 2026///
SN - 2768-1688
TI - FreeStanding LigninDerived Hard Carbon Anodes for Sustainable PotassiumIon Batteries
T2 - Battery Energy
UR - http://dx.doi.org/10.1002/bte2.70159
UR - https://doi.org/10.1002/bte2.70159
VL - 5
ER -
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