MXENE MODIFICATION METHODS TO ENHANCE THE CAPACITANCE PERFORMANCE OF ENERGY STORAGE DEVICES

This review comprehensively analyzes and systematizes modern modification methods aimed at improving the capacitance characteristics of two-dimensional MXene materials, primarily Ti₃C₂Tₓ and related compounds, for their use in supercapacitors and hybrid energy storage devices. The high electronic conductivity, layered structure, and chemically active surface of MXene materials make them promising electrode materials for energy storage devices. However, their practical application is characterized by a number of limitations, such as layer re-densification, limited availability of active centers, and reduced structural stability during long-cycle operation. In this review, the main modification strategies affecting the electrochemical properties of MXene materials are considered, including intercalation-based interlayer spacing control, functionalization of surface terminal groups, composite formation with carbon nanomaterials and transition metal oxides, heteroatom doping, morphological engineering, and various post-processing methods. The impact of these approaches on the ionic and electronic conductivity, pseudocondensation fraction, and cyclic stability of electrode materials is comparatively evaluated. Based on the literature data, a generalized analysis is carried out on the specific capacitance and long-term cyclic stability indicators, and practical recommendations and future research directions for optimizing MXene-based electrodes are formulated.

1. MXenes: A new family of two-dimensional materials / M. Naguib et al // Advanced Materials. – 2014. – Т. 26, № 7. – Р. 992-1005.

2. Conductive two-dimensional titanium carbide clay with high volumetric capacitance / M. Ghidiu et al // Nature. – 2014. – Т. 516. – Р. 78-81.

3. Transparent conductive two-dimensional titanium carbide epitaxial thin films / J. Halim et al // Chemistry of Materials. – 2014. – Т. 26, № 7. – Р. 2374-2381.

4. Anasori B. 2D metal carbides and nitrides (MXenes) for energy storage / B. Anasori, M.R. Lukatskaya, Y. Gogotsi // Nature Reviews Materials. – 2017. – Т. 2. – № 16098.

5. Ultra-high-rate pseudocapacitive energy storage in two-dimensional transition metal carbides / M.R. Lukatskaya et al // Nature Energy. – 2017. – Т. 2. – № 17105.

6. Guidelines for synthesis and processing of two-dimensional titanium carbide (Ti₃C₂Tₓ MXene) / M. Alhabeb et al // Chemistry of Materials. – 2017. – Т. 29, № 18. – P. 7633-7644.

7. MXenes: An introduction of their synthesis, select properties, and applications / L. Verger et al // Trends in Chemistry. – 2019. – Т. 1, № 7. – P. 656-669.

8. Gogotsi Y. The rise of MXenes / Y. Gogotsi, B. Anasori // ACS Nano. – 2019. – Т. 13, № 8. – P. 8491-8494.

9. Carbon-intercalated Ti₃C₂Tₓ MXene for high-performance supercapacitors / L. Shen et al // Journal of Materials Chemistry A. – 2018. – Т. 6, № 46. – P. 23513-23520.

10. Flexible and conductive MXene films and nanocomposites with high capacitance / Z. Ling et al // Proceedings of the National Academy of Sciences of the United States of America. – 2014. – Т. 111, № 47. – P. 16676-16681.

11. Pseudocapacitance of MXene nanosheets for high-power sodium-ion hybrid capacitors / X. Wang et al // Nature Communications. – 2015. – Т. 6. – № 6544.

12. Two-dimensional vanadium carbide MXene as positive electrode for sodium-ion capacitors / Y. Dall’Agnese et al // Journal of Physical Chemistry Letters. – 2015. – Т. 6, № 12. – P. 2305-2309.

13. Pseudocapacitive electrodes produced by oxidation of MXenes / M. Boota et al // Advanced Materials. – 2016. – Т. 28, № 7. – P. 1517-1522.

14. Pillared MXene with ultralarge interlayer spacing for enhanced sodium-ion storage / J. Luo et al // ACS Nano. – 2017. – Т. 11, № 3. – P. 2459-2469.

15. MXene hydrogels: fundamentals and applications / Y.Z. Zhang et al // Chemical Society Reviews. – 2020. – Т. 49, № 20. – P. 7229-7251.

16. Intercalation chemistry of MXenes for energy storage / H. Wang et al // Energy Storage Materials. – 2019. – Т. 17. – P. 119-129.

17. Nitrogen-doped MXene for enhanced supercapacitor performance / H. Shao et al // Electrochimica Acta. – 2019. – Т. 318. – P. 676-684.

18. Sulfur-doped MXene electrodes for high-performance supercapacitors / Y. Li et al // Journal of Power Sources. – 2020. – Т. 451. – № 227777.

19. Ti₃C₂Tₓ MXene/graphene composites for high-performance energy storage / Y. Dong et al // Carbon. – 2017. – Т. 119. – P. 351-360.

20. All-MXene asymmetric supercapacitors / Y. Peng et al // Energy and Environmental Science. – 2016. – Т. 9. – P. 2847-2854.

21. High-temperature stability of MXenes / M. Seredych et al // Carbon. – 2019. – Т. 146. – P. 712- 723.

22. Yu X. Electrode-electrolyte interfaces in MXene-based supercapacitors / X. Yu, A. Manthiram // Energy Storage Materials. – 2020. – Т. 29. – P. 368-382.

23. A non-aqueous asymmetric cell with a Ti₂C-based two-dimensional electrode / J. Come et al // Journal of the Electrochemical Society. – 2012. – Т. 159, № 8. – P. A1368-A1373.

24. Flexible MXene films for microsupercapacitors / C. Zhang et al // Advanced Functional Materials. – 2018. – Т. 28. – № 1705506.

25. Surface chemistry tuning of MXenes for electrochemical energy storage / S.J. Kim et al // ACS Applied Materials and Interfaces. – 2018. – Т. 10. – P. 2746-2756.

26. Layered Ti₃C₂Tₓ MXene for supercapacitors / F. Liu et al // Journal of Materials Chemistry A. – 2017. – Т. 5. – P. 15983-15990.

27. Hollow MXene spheres and 3D frameworks for sodium-ion storage / M.Q. Zhao et al // Advanced Materials. – 2017. – Т. 29. – № 1702410.

28. Pillared MXene for high-rate electrochemical energy storage / H. Wang et al // Energy Storage Materials. – 2019. – Т. 17. – P. 14-22.

29. Additive-free MXene inks and direct printing of micro-supercapacitors / C. Zhang et al // Nature Communications. – 2019. – Т. 10. – № 1795.

30. El-Demellawi J.K. MXene-enabled electrochemical energy storage: synthesis, properties, and applications / J.K. El-Demellawi, L. McKeon, Y. Gogotsi // Advanced Energy Materials. – 2021. – Т. 11. – № 2003517.

31. Novel amperometric glucose biosensor based on MXene nanocomposite / R.B. Rakhi et al // Biosensors and Bioelectronics. – 2016. – Т. 83. – P. 42-47.

32. Xie Y. Hybrid density functional study of structural and electronic properties of MXenes / Y. Xie, P.R.C. Kent // Physical Review B. – 2013. – Т. 87. – № 235441.

33. Tang Q. Are MXenes promising anode materials for lithium-ion batteries? / Q. Tang, Z. Zhou, P. Shen // Journal of the American Chemical Society. – 2012. – Т. 134. – P. 16909-16916.

34. Electrochemical and in situ X-ray diffraction studies of Ti₃C₂Tₓ MXene in ionic liquid electrolyte / Z. Lin et al // Electrochemistry Communications. – 2016. – Т. 72. – P. 50-53.

35. Electrochemical characterization of MXene electrodes using operando techniques / J. Come et al // Journal of Physical Chemistry Letters. – 2015. – Т. 6. – P. 2802-2807.

36. MXene–polymer nanocomposites for flexible energy storage devices / W.T. Cao et al // Advanced Functional Materials. – 2020. – Т. 30. – № 1907316.

37. MXene-based nanocomposites for supercapacitors / W. Zheng et al // Journal of Energy Chemistry. – 2021. – Т. 54. – P. 431-450.

38. High-performance flexible supercapacitors based on MXene composites / J. Zhang et al // Nano Energy. – 2019. – Т. 60. – P. 894-902.

39. All-pseudocapacitive MXene–RuO₂ asymmetric supercapacitors / Q. Jiang et al // Advanced Energy Materials. – 2018. – Т. 8. – № 1703043.

40. High-capacitance MXene–MnO₂ composites / M. Hu et al // Chemical Engineering Journal. – 2020. – Т. 384. – № 123336.

41. Charge transfer and storage in MXene electrodes / C. Chen et al // Energy Storage Materials. – 2018. – Т. 11. – P. 18-26.

42. Wen Y. Metal oxides and MXenes for supercapacitors / Y. Wen, T.E. Rufford, D. HulicovaJurcakova // Chemical Society Reviews. – 2021. – Т. 50. – P. 3044-3079.

43. Graphene/polyaniline nanofiber composites / K. Zhang et al // Chemistry of Materials. – 2010. – Т. 22. – P. 1392-1401.

44. Ti₃C₂ MXene nanocomposites for energy storage / J. Li et al // Nano Energy. – 2017. – Т. 33. – P. 473-486.

45. Functionalized MXene nanosheets for high-performance supercapacitors / C. Zhao et al // Journal of Materials Chemistry A. – 2019. – Т. 7. – P. 19314-19323.

46. Scaling up MXene production / L. Dong et al // Journal of Materials Chemistry A. – 2017. – Т. 5. – P. 19123-19133.

47. Fluorine-free synthesis of MXenes / T. Li et al // Angewandte Chemie International Edition. – 2018. – Т. 57. – P. 6115-6119.

48. A review of MXene-based materials for energy storage / P. Zhang et al // Energy Storage Materials. – 2021. – Т. 36. – P. 147-170.

49. Surface engineering of MXenes / L. Wang et al // Nano Today. – 2022. – Т. 42. – № 101358.

50. Chen X. Recent advances in MXene-based supercapacitors / X. Chen, Z. Zhang, Z. Zhou // Journal of Power Sources. – 2023. – Т. 560. – № 232693.