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Nano Materials-building blocks
for the sustainable energy

松見研究室 MATSUMI Laboratory
講師:バダム ラージャシェーカル(BADAM Rajashekar)

E-mail:
[研究分野]
Energy materials, Electrocatalysis
[キーワード]
Metal nanoparticles, Heteroatom doped nano-carbon, Functionalized nano-carbon, Electro-catalysis, Organic inorganic hybrid materials

研究を始めるのに必要な知識・能力

Students who are motivated, curious, proactive to learn and understand materials will be best suited. Fundamental understanding of Organic Chemistry/Polymer Chemistry/Electrochemistry, will be advantageous (not mandatory). Should be able to work in an international environment.

この研究で身につく能力

Basic skills of designing, preparation, and characterization of nanoparticles, nanocarbons like graphene, heteroatom doped graphene, functionalized acetylene black and hard carbons etc. Fundamental understanding of electrochemical techniques to objectively understand the properties of the materials like cyclic voltammetry, linear-sweep voltammetry, rotating disc electrode based, chronopotentio/amperemetry, impedance and charge-discharge studies. These techniques will also be used for evaluation of electrocatalysis, Li/Na ion battery and Li air battery. More importantly students can improve communication skills in terms of speaking, technical writing, and presentations.

【就職先企業・職種】 Chemical companies, fuel cell related and battery companies,

研究内容


Novel organic-inorganic composites for electrocatalysis


Coin Cell Configuration of Li-Air Battery

1) Novel Organic-inorganic Composites for Electrocatalysis:

Conventional catalysts use simple physisorption of nanoparticles over the conducting substrates which makes nanoparticles easy to diffuse and agglomerate. Our research attempts to tune the electronic structure of metal & metal oxide catalysts by altering the electron density of the substrates upon which it is decorated. We work on the two most important aspects that left untrodden, they are, 1) tuning the electron density of catalyst by varying the functional groups on the tailorable conducting polymer 2) establish electronic interaction between IrO2 nanoparticles and substrate for enhanced charge transfer, to reduce the diffusion and dissolution of IrO2 over long period of usage (high durability).

2) Next Generation Energy Materials:

Rechargeable metal (Li and Na) air batteries with specific energy several times (~10) higher than Li ion batteries have recently gained humongous research interest. Electrocatalyst for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) at cathode plays a key role in determining the efficiency and stability of metal air batteries. Generally, Pt, Ir or Ru based catalysts are used for this purpose. To make this technology economically viable we are working on designing extremely low Pt group metal loaded catalysts, lower transition metal/metal oxide (Mn, Fe, Co, Ni), metal free catalysts in combination with novel conducting polymers and heteroatom doped carbon materials as cathode materials.

3) Fast Charging and Long Cycling Anode Materials for Li and Na ion Batteries:

Extensive utilization of heteroatom chemistry will be the key for unraveling the enigma of fast charging and long cycling anode materials for Li and Na ion batteries for electric vehicle applications. We design nano materials with high heteroatom doping to realize the goal.

主な研究業績

  1. Badam R. et al., Synthesis and electrochemical analysis of novel IrO2 nanoparticle catalysts supported on carbon nanotube for oxygen evolution reaction, Int. J. Hydrog. Energy, 43, 18095, 2018.
  2. Badam R. Sacrificial Reducing Agent Free Photo-Generation of Platinum Nano Particle over Carbon/TiO2 for Highly Efficient Oxygen Reduction Reaction, et al., Sci. Rep. 6, 37006, 2016.
  3. Badam R. et al., Platinum decorated functionalized defective acetylene black; a promising cathode material for the oxygen reduction reaction, Chem Commun, 51, 9841, 2015.

使用装置

Vacuum glove box, Electrochemical workstations, Solar simulator, Gel permeation chromatography, Fluorescence, UV-Vis and FT-IR spectrometers, Ball mill, Tube furnace, Hydrothermal autoclave, Gas chromatography, Karl Fischer titration.

研究室の指導方針

On the basis of organic and inorganic chemistry, we are working on challenging research fields of high social demands such as Li & Na ion secondary battery, oxygen reduction/evolution reaction (fuel cell/metal-air batteries) and electrochemical water splitting. We welcome students of various backgrounds such as organic chemistry, inorganic chemistry, electrochemistry, polymer chemistry, analytical chemistry, photo chemistry, device-oriented materials engineering etc.

[研究室HP] URL:http://www.jaist.ac.jp/ms/labs/matsumi/english/index.html

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