TY - JOUR

T1 - Pine Nutshell Derived Activated Carbon for Ionic Liquid-Based Supercapacitor: Elicitation of Oxygen Content Effect

AU - Лебедева, Марина Валерьевна

AU - Елецкий, Петр Михайлович

AU - Мозылева, Мария Андреевна

AU - Мосеенков, Сергей Иванович

AU - Грибов, Евгений Николаевич

AU - Аюпов, Артём Борисович

AU - Яковлев, Вадим Анатольевич

N1 - Investigation of physico-chemical characteristics was carried out with the financial support of Ministry of Science and Higher Education of the Russian Federation within the governmental order for Boreskov Institute of Catalysis (projects FWUR-2024-0036 and FWUR-2024-0038). The synthesis and electrochemical study of ACs was carried out with the financial support of Ministry of Science and Higher Education of theRussian Federation within the governmental order for Novosibirsk State University (project FSUS-2025-0014).

PY - 2026/7/10

Y1 - 2026/7/10

N2 - Biomass-derived activated carbons (ACs) have continuously attracted interest as sustainable, low-cost materials for supercapacitor (SC) electrodes. In this study, to reveal the effect of oxygen content on performance of ionic liquid-based SC series of pine nutshell -derived ACs were synthesized by KOH activation. Variation of activation condition and additional thermal treatment in an inert atmosphere allows obtaining samples with microporous structure (Nμ = 70% – 80%), SBET 1145 – 2036 m2·g−1, and oxygen content 2% – 15 at %. Systematic investigation of the synthesized ACs and capacitive performance in BMIMBF4/ACN electrolyte indicated the following effect of oxygen content: i) direct relationship between oxygen content and initial capacitance due to significant contribution of faradaic processes (up to 30%) in energy accumulation process. ii) inverse relationship between oxygen content and long-term stability. SCs based on samples with high oxygen content possess the worse capacitance retention in symmetric configuration (up to 30%). Asymmetric mass-balanced SCs possess higher stability (82% – 90%), but characterized by a high resistance and low capacitance due to thick electrodes.

AB - Biomass-derived activated carbons (ACs) have continuously attracted interest as sustainable, low-cost materials for supercapacitor (SC) electrodes. In this study, to reveal the effect of oxygen content on performance of ionic liquid-based SC series of pine nutshell -derived ACs were synthesized by KOH activation. Variation of activation condition and additional thermal treatment in an inert atmosphere allows obtaining samples with microporous structure (Nμ = 70% – 80%), SBET 1145 – 2036 m2·g−1, and oxygen content 2% – 15 at %. Systematic investigation of the synthesized ACs and capacitive performance in BMIMBF4/ACN electrolyte indicated the following effect of oxygen content: i) direct relationship between oxygen content and initial capacitance due to significant contribution of faradaic processes (up to 30%) in energy accumulation process. ii) inverse relationship between oxygen content and long-term stability. SCs based on samples with high oxygen content possess the worse capacitance retention in symmetric configuration (up to 30%). Asymmetric mass-balanced SCs possess higher stability (82% – 90%), but characterized by a high resistance and low capacitance due to thick electrodes.

KW - activated carbon

KW - alkali activation

KW - nutshell

KW - oxygen-containing group

KW - supercapacitor

UR - https://www.scopus.com/pages/publications/105044065751

U2 - 10.1002/slct.73782

DO - 10.1002/slct.73782

M3 - Article

VL - 11

JO - ChemistrySelect

JF - ChemistrySelect

SN - 2365-6549

IS - 26

M1 - e73782

ER -