The latest ESM review by Wenchao Bi of Shanghai Institute of Technology, Guangming Wu of Tongji, and Guozhong Cao of the University of Washington: Research progress of MXenes sodium-ion batteries
【Article Information】
Application of MXenes and its composite electrode materials in sodium-ion batteries
First author: Bi Wenchao
Contact: GAO Guo-hua*, ZHANG Zeng-hai*, WU Guang-ming*, CAO Guo-zhong*
Affiliation: University of Shanghai for Science and Technology, Tongji University, University of Washington
【Background】
Sodium-ion batteries are expected to be a supplement or replacement for lithium-ion batteries due to their abundant resources and low cost, so they have a wide range of application prospects in large-scale energy storage applications. MXenes (Mn+1XnTx), as a new type of two-dimensional transition metal carbide, nitride and carbonitride, have been applied to sodium-ion batteries due to their high electronic conductivity, controllable structure and surface chemistry. In this paper, we summarize the research progress of MXene based sodium-ion batteries, and discuss their future research directions to facilitate the research and further application of sodium-ion batteries.
【Introduction】
Recently, Bi Wenchao from the University of Shanghai for Science and Technology, Professor Wu Guangming from Tongji University, and Professor Cao Guozhong from the University of Washington published a review article entitled "MXenes and their composites as electrodes for sodium ion batteries" in the internationally renowned journal Energy Storage Materials. In this paper, the structure and properties of MXenes are introduced in detail, and the key influencing factors of the electrochemical properties of MXenes are analyzed. Then, according to different synthesis strategies, the research progress of MXenes and its composites in the anode and cathode of sodium-ion batteries was systematically summarized. Finally, this paper puts forward the prospect of the research direction of MXenes for sodium-ion batteries, which provides a direction for the further application of sodium-ion batteries.
Figure 1. Comparison of alkali metal ion batteries.
Figure 2. The application of MXenes in different secondary batteries.
Figure 3. The development of MXenes synthesis strategy.
Figure 4. MXenes synthesized by top-down and bottom-up methods, as well as MXene complexes synthesized by self-assembly, secondary growth, and in-situ derivatization, exhibit unique electrochemical properties and mechanisms when applied to sodium-ion battery electrode materials.
Figure 4. Outlook for MXenes sodium-ion batteries.
【Main points of the text】
Point 1: Structure and characteristics of MXenes
MXene is a two-dimensional layered structure, and its rich chemical composition, tunable crystal structure and surface energy functional groups endow MXene with unique electronic properties, chemical stability, hydrophilic properties, mechanical properties, etc.
Point 2: Key factors affecting the electrochemical performance of MXenes
The electrochemical properties of MXenes are closely related to their surface chemistry, interlayer distance, and microstructure. The surface functional groups, interlayer distance and microstructure of MXenes can directly affect the behavior of electrons and ions, and affect their ability to store charges, which have become the key factors affecting the electrochemical performance of MXenes.
Point 3: Application of MXenes and their complexes in the anode of sodium-ion batteries
The structure and properties of MXene are closely related to its synthesis strategy, including the top-down (non-)fluorinated preparation method and the bottom-up synthesis method. MXene complexes exhibit different electrochemical properties and energy storage mechanisms through strategies such as self-assembly, secondary growth, and in-situ conversion.
Point 4: Application of MXene complex in sodium-ion battery anode
MXene composites are also used in anode materials for sodium-ion batteries, and MXene is mainly used to improve the electronic conductivity and structural stability of anode materials, which is relatively less than the application of anode materials.
Point 5: Outlook
At present, the research on MXene sodium-ion batteries is still limited, and this paper discusses and puts forward the future development direction of MXene in the field of sodium-ion batteries from the aspects of material optimization, new type research and development, in-depth learning of energy storage mechanism, and device design.
【Article Link】
MXenes and their composites as electrodes for sodium ion batteries
Full text link: https://doi.org/10.1016/j.ensm.2024.103568