Tailoring charge-storage kinetics in MXene-based nanocomposites for high-performance lithium-ion battery anodes
Journal of Electroanalytical Chemistry, cilt.1022, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 1022
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.jelechem.2026.120543
- Dergi Adı: Journal of Electroanalytical Chemistry
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica, Compendex, INSPEC
- Anahtar Kelimeler: Composite anode electrode, Energy storage, LIBs, MXene, ZIF-67
- Van Yüzüncü Yıl Üniversitesi Adresli: Evet
Özet
Lithium-ion batteries (LIBs) are important for large-scale energy storage and portable electronics because of their high energy density and long cycle life. The development of electrode materials with controlled charge-transfer resistance, rate response, and cycling stability remains a central challenge. Metal–organic framework (MOF)/MXene composites combine MOF porosity and tunable coordination environments with MXene electrical conductivity and surface terminations, allowing systematic examination of interfacial Li-ion storage. Here, ZIF-67 is grown in situ on Nb2CTx, V2CTx, and Ti3C2Tx to compare how the MXene substrate affects redox behavior, impedance, and capacitive/diffusion-controlled charge storage. Electrochemical tests show that ZIF-67@Nb2CTx delivers a reversible capacity of ∼510 mAh g−1 after 1000 cycles at 2 A g−1 and a charge-transfer resistance of 194 Ω, lower than those of ZIF-67@V2CTx (280 Ω) and ZIF-67@Ti3C2Tx (710 Ω). Analysis of scan-rate-dependent CV data indicates a predominantly capacitive contribution for ZIF-67@Nb2CTx, increasing from 67% at 0.1 mV s−1 to 86% at 1.0 mV s−1, whereas the V2CTx- and Ti3C2Tx-based electrodes show larger diffusion-controlled fractions. These results identify the role of MXene composition and surface chemistry in regulating Li-ion storage kinetics in ZIF-67@MXene anodes.