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Journal of The Electrochemical Society, 161(5) A718-A725 (2014)
0013-4651/2014/161(5)/A718/8/©The Electrochemical Society
Electrochemical Kinetics of Nanostructured Nb2O5 Electrodes
Jeremy Come,a,b Veronica Augustyn,c Jong Woung Kim,c Patrick Rozier,a,b Pierre-Louis Taberna,a,b Pavel Gogotsi,d,e Jeffrey W. Long,d,∗ Bruce Dunn,c,∗and Patrice Simona,b,∗,z
a Universit´ e Paul Sabatier, CIRIMAT UMR CNRS 5085, 31062 Toulouse Cedex 4, France
b R´ eseau sur le Stockage Electrochimique de l’Energie (RS2E), FR CNRS 3459, France
c Department of Materials Science & Engineering, University of California, Los Angeles, California 90095, USA
d Surface Chemistry Branch, Naval Research Laboratory, Washington, DC 20375, USA
Abstract
Pseudocapacitive charge storage is based on faradaic charge-transfer reactions occurring at the surface or near-surface of redox-active materials. This property is of great interest for electrochemical capacitors because of the substantially higher capacitance obtainable as compared to traditional double-layer electrode processes. While high levels of pseudocapacitance have been obtained with nanoscale materials, the development of practical electrode structures that exhibit pseudocapacitive properties has been challenging.
The present paper shows that electrodes of Nb2O5 successfully retain the pseudocapacitive properties of the corresponding nanoscale materials. For charging times as fast as one minute, there is no indication of semi-infinite diffusion limitations and specific capacitances of 380 F g −1 and 0.46 Fcm −2 are obtained in 40-μm thick electrodes at a mean discharge potential of 1.5 V vs Li+ /Li. In-situ X-ray diffraction shows that the high specific capacitance and power capabilities of Nb2O5 electrodes can be attributed to fast Li + intercalation within specific planes in the orthorhombic structure.
This intercalation pseudocapacitance charge-storage mechanism is characterized as being an intrinsic property of Nb2O5 that facilitates the design of electrodes for capacitive storage devices. Authors demonstrate the efficacy of these electrodes in a hybrid electrochemical cell whose energy density and power density surpass that of commercial carbon-based devices.
© 2014 The Electrochemical Society. [DOI:10.1149/2.040405jes]
MXenes potential applications include sensors, wound healing materials, and drug delivery systems. A recent study explored how different synthesis methods affect the safety and performance of MXenes. By comparing etching conditions and intercalation strategies, researchers discovered that fine-tuning the surface chemistry of MXenes plays a crucial role in improving biocompatibility. These results provide practical guidelines for developing safer MXenes and bring the field one step closer to real biomedical applications.
Exellent news, our joint patent application with Drexel University on highly porous MAX phase precursor for MXene synthesis published. Congratulations and thanks to all team involved!
Last Call! Have you submitted your abstract for IEEE NAP-2025 yet? Join us at the International Symposium on "The MXene Frontier: Transformative Nanomaterials Shaping the Future" – the largest MXene-focused conference in Europe this year! Final Submission Deadline: May 15, 2025. Don’t miss this exclusive opportunity to showcase your research and engage with world leaders in the MXene field!
We are excited to announce the publication of latest review article on MXenes in Healthcare. This comprehensive review explores the groundbreaking role of MXenes—an emerging class of 2D materials—in revolutionizing the fields of medical diagnostics and therapeutics. Read the full article here: https://doi.org/10.1039/D4NR04853A.
Congratulations and thank you to our collaborators from TU Wien and CEST for very interesting work and making it published! In this work, an upscalable electrochemical MXene synthesis is presented. Yields of up to 60% electrochemical MXene (EC-MXene) with no byproducts from a single exfoliation cycle are achieved.
Congratulations to all collaborators with this interesting joint work!
Thank you to our collaborators for the amazing joint work recently published in Graphene and 2D Nanomaterials about MXene–silk fibroin composite films aiming to develop materials with tunable electronic and thermal properties
Dr. Oleksiy Gogotsi, director of MRC and Carbon-Ukraine, innovative companies that are among the leaders on the world MXene market, visited 2024 MRS Fall Meeting & Exhibit. together with Dr. Maksym Pogorielov, Head of Advanced Biomaterials and Biophysics Laboratory, University of Latvia.
MRC and Carbon-Ukraine team visited the 3rd International MXene conference held at Drexel University on August 5-8, 2024. Conference brought together the best reserchers and leading experts on MXene field. 
Together with colleagues from the University of Latvia, MRC/Carbone Ukraine, Adam Mickiewicz University, University Clinic Essen, and others, we have developed a novel concept involving the binding of antibodies to MXenes. In our research, we utilized anti-CEACAM1 antibodies to develop targeted photo-thermal therapy for melanoma (in vitro), paving the way for future in vivo studies and clinical trials. For the first time, we demonstrate the feasibility of delivering MXenes specifically targeted to melanoma cells, enabling the effective ablation of cancer cells under near-infrared (NIR) light. This new technique opens up vast potential for the application of MXenes in cancer treatment, diagnostics, drug delivery, and many other medical purposes.
