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Role of MXene surface terminations in electrochemical energy storage:A review

Chinese Chemical Letters 2021年第9期32卷 2648-2658页

作者： Zhuoheng Bao Chengjie Lu Xin Cao Peigen Zhang Li Yang Heng Zhang Dawei Sha Wei He Wei Zhang Long Pan Zhengming Sun School of Materials Science and Engineering Southeast UniversityNanjing 211189China

MXenes are a group of recently discovered 2D materials and have attracted extensive attention since their first report in 2011;they have shown excellent prospects for energy storage applications owing to their unique layered microstructure and tunable electrical *** major feature of MXenes is their tailorable surface terminations(e.g.,-F,-O,-OH).Numerous studies have indicated that the composition of the surface terminations can significantly impact the electrochemical properties of ***,the underlying mechanisms are still poorly understood,mainly because of the difficulties in quantitative analysis and *** review summarizes the latest research progress on MXene ***,a systematic introduction to the approaches for preparing MXenes is presented,which generally dominates the surface ***,theoretical and experimental efforts regarding the surface terminations are discussed,and the influence of surface terminations on the electronic and electrochemical properties of MXenes are ***,we present the significance and research prospects of MXene *** expect this review to encourage research on MXenes and provide guidance for usingthese materials for batteries and supercapacitors.

关键词： MXene surface terminations Energy storage First-principles calculation Batteries Supercapacitors

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Stoichiometric Ti_(3)C_(2)T_(x)Coating for Inhibiting Dendrite Growth in Anode-Free Lithium Metal Batteries

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Energy & Environmental Materials 2024年第4期7卷 153-162页

作者： Xiangrong Zeng Manmatha Mahato Woong Oh Hyunjoon Yoo Van Hiep Nguyen Saewoong Oh Geetha Valurouthu Soon-Ki Jeong Chi Won Ahn Yury Gogotsi Il-Kwon Oh National Creative Research Initiative for Functionally Antagonistic Nano-Engineering Department of Mechanical EngineeringKorea Advanced Institute of Science and Technology(KAIST)291 Daehak-roYuseong-guDaejeon 34141Korea Department of Materials Science&Engineering and A.J.Drexel Nanomaterials InstituteDrexel UniversityPhiladelphiaPennsylvania 19104USA Department of Energy Engineering Soonchunhyang University22Soonchunhyang-roSinchang-myeonAsan-siChungcheongnam-do 31538Korea National Nanofab Center(NNFC) Korea Advanced Institute of Science and Technology(KAIST)291 Daehak-roYuseong-guDaejeon 34141Korea

Lithium metal batteries(LMBs)and anode-free LMBs(AFLMBs)present a solution to the need for batteries with a significantly superior theoretical energy ***,their adoption is hindered by low Coulombic efficiency(CE)and rapid capacity fading,primarily due to the formation of unstable solid electrolyte interphase(SEI)layer and Li dendrite growth as a result of uneven Li ***,we report on the use of a stoichiometric Ti_(3)C_(2)T_(x)(S-Ti_(3)C_(2)T_(x))MXene coating on the copper current collector to enhance the cyclic stability of an anode-free lithium metal *** S-Ti_(3)C_(2)T_(x)coating provides abundant nucleation sites,thereby lowering the overpotential for Li nucleation,and promoting uniform Li ***,the fluorine(-F)termination of S-Ti_(3)C_(2)T_(x)participates in the SEI formation,producing a LiF-rich SEI layer,vital for stabilizing the SEI and improving cycle *** equipped with S-Ti_(3)C_(2)T_(x)@Cu current collectors displayed reduced Li consumption during stable SEI formation,resulting in a significant decrease in capacity *** with S-Ti_(3)C_(2)T_(x)@Cu current collectors achieved a high initial capacity density of 4.2 mAh cm^(-2),70.9%capacity retention after 50 cycles,and an average CE of 98.19%in 100 *** innovative application of MXenes in the energy field offers a promising strategy to enhance the performance of AFLMBs and could potentially accelerate their commercial adoption.

关键词： anode-free lithium metal batteries stoichiometric MXene solid electrolyte interphase surface terminations

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