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  • 1.
    Appadurai, Tamilselvan
    et al.
    Univ Madras, Natl Ctr Nanosci & Nanotechnol, Guindy Campus, Chennai 600025, Tamil Nadu, India..
    Subramaniyam, Chandrasekar M.
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology.
    Kuppusamy, Rajesh
    Univ Madras, Dept Phys Chem, Guindy Campus, Chennai 600025, Tamil Nadu, India..
    Karazhanov, Smagul
    Inst Energy Technol IFE, Dept Solar Energy, N-2027 Kjeller, Norway..
    Subramanian, Balakumar
    Univ Madras, Natl Ctr Nanosci & Nanotechnol, Guindy Campus, Chennai 600025, Tamil Nadu, India..
    Electrochemical Performance of Nitrogen-Doped TiO2 Nanotubes as Electrode Material for Supercapacitor and Li-Ion Battery2019In: Molecules, ISSN 1431-5157, E-ISSN 1420-3049, Vol. 24, no 16, article id 2952Article in journal (Refereed)
    Abstract [en]

    Electrochemical anodized titanium dioxide (TiO2) nanotubes are of immense significance as electrochemical energy storage devices owing to their fast electron transfer by reducing the diffusion path and paving way to fabricating binder-free and carbon-free electrodes. Besides these advantages, when nitrogen is doped into its lattice, doubles its electrochemical activity due to enhanced charge transfer induced by oxygen vacancy. Herein, we synthesized nitrogen-doped TiO2 (N-TiO2) and studied its electrochemical performances in supercapacitor and as anode for a lithium-ion battery (LIB). Nitrogen doping into TiO2 was confirmed by Raman spectroscopy and X-ray photoelectron spectroscopy (XPS) techniques. The electrochemical performance of N-TiO2 nanotubes was outstanding with a specific capacitance of 835 mu F cm(-2) at 100 mV s(-1) scan rate as a supercapacitor electrode, and it delivered an areal discharge capacity of 975 mu A h cm(-2) as an anode material for LIB which is far superior to bare TiO2 nanotubes (505 mu F cm(-2) and 86 mu A h cm(-2), respectively). This tailor-made nitrogen-doped nanostructured electrode offers great promise as next-generation energy storage electrode material.

  • 2.
    Cui, Yuxiao
    et al.
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Polymeric Materials.
    Subramaniyam, Chandrasekar M.
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology.
    Li, Lengwan
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center.
    Han, Tong
    KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
    Kang, Mina
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.
    Li, Jian
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology.
    Zhao, Luyao
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.
    Wei, Xin-Feng
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.
    Svagan, Anna Justina
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.
    Hamedi, Mahiar
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center.
    Hierarchical soot nanoparticle self-assemblies for enhanced performance as sodium-ion battery anodes2022In: Journal of Materials Chemistry A, ISSN 2050-7488, E-ISSN 2050-7496, Vol. 10, no 16, p. 9059-9066Article in journal (Refereed)
    Abstract [en]

    The drawbacks of amorphous hard carbon are its low conductivity and structural instability, due to its large volume change and the occurrence of side reactions with the electrolyte during cycling. Here, we propose a simple and rapid method to address these disadvantages; we used an emulsion solvent-evaporation method to create hierarchically structured microparticles of hard carbon nanoparticles, derived from soot, and multi-walled-carbon-nanotubes at a very low threshold of 2.8 wt%. These shrub-ball like microparticles have well-defined void spaces between different nanostructures of carbon, leading to an increased surface area, lower charge-resistance and side reactions, and higher electronic conductivity for Na+ insertion and de-insertion. They can be slurry cast to assemble Na+ anodes, exhibiting an initial discharge capacity of 713.3 mA h g(-1) and showing long-term stability with 120.8 mA h g(-1) at 500 mA g(-1) after 500 cycles, thus outperforming neat hard carbon nanoparticles by an order of magnitude. Our work shows that hierarchical self-assembly is attractive for increasing the performance of microparticles used for battery production.

  • 3.
    Faisal, Shaikh Nayeem
    et al.
    Univ Wollongong, Australian Inst Innovat Mat AIIM Facil, ARC Ctr Excellence Electromat Sci, Wollongong, NSW, Australia.;Univ Wollongong, Australian Inst Innovat Mat AIIM Facil, Intelligent Polymer Res Inst, Wollongong, NSW, Australia..
    Subramaniyam, Chandrasekar M.
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology.
    Islam, Md Monirul
    Univ Newcastle, Sch Environm & Life Sci, Newcastle, NSW, Australia..
    Chowdhury, Aminul Islam
    Univ Chittagong, Dept Appl Chem & Chem Engn, Chittagong, Bangladesh..
    Dou, Shi Xue
    Univ Wollongong, Inst Superconducting & Elect Mat, Australian Inst Innovat Mat AIIM Facil, Wollongong, NSW, Australia..
    Roy, Anup Kumar
    Univ Sydney, Sch Chem & Biomol Engn, Lab Sustainable Technol, Sydney, NSW, Australia..
    Harris, Andrew T.
    Univ Sydney, Sch Chem & Biomol Engn, Lab Sustainable Technol, Sydney, NSW, Australia..
    Minett, Andrew, I
    Univ Sydney, Sch Chem & Biomol Engn, Lab Sustainable Technol, Sydney, NSW, Australia.;Sicona Battery Technol, 203-18 Danks St, Sydney, NSW 2017, Australia..
    3D copper-confined N-Doped graphene/carbon nanotubes network as high-performing lithium-ion battery anode2021In: Journal of Alloys and Compounds, ISSN 0925-8388, E-ISSN 1873-4669, Vol. 850, article id 156701Article in journal (Refereed)
    Abstract [en]

    A facile synthesis of three-dimensional (3D) network of copper confined nitrogen-doped graphene (NG)/carbon nanotube (CNT) with high atomic percentage of nitrogen (10.1 at.%) has been reported. The homogenous intercalation of the CNT network in-between the graphene layers decorated with copper nanoparticles take place which inhibits the self-agglomeration within the lattice and enhance the volumetric storage capability. The composite electrode demonstrates exceptionally high specific capacitance of 1250 mA h/g obtained at a current density of 0.1 A/g which is 3.4 times greater than the theoretical capacity of graphite (372 mA h/g). The discharge-charge profiles (from 0.002 to 3 V) with reversible battery capacity exhibit a stable state of the lithium-ion batteries which were observed at high rate capability of 420 mA h/g at a current density of 1 A/g even after 500 cycles. The enhancement of the electrochemical performance could be attributed to the 3D electrically conductive networks of copper confined nitrogen-doped graphene/carbon nanotubes (Cu@[N-Gr/CNT]).

  • 4.
    Nanwani, Alisha
    et al.
    RTM Nagpur Univ, Dept Phys, Energy Mat & Devices Lab, Nagpur, Maharashtra, India.;Indian Inst Technol, Dept Phys, Mumbai, Maharashtra, India..
    Deshmukh, Kavita A.
    Visvesvaraya Natl Inst Technol, Dept Met & Mat Engn, Nagpur, Maharashtra, India..
    Subramaniyam, Chandrasekar M.
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology.
    Deshmukh, Abhay D.
    RTM Nagpur Univ, Dept Phys, Energy Mat & Devices Lab, Nagpur, Maharashtra, India..
    Augmenting the nickel-cobalt layered double hydroxide performance: Virtue of doping2020In: Journal of Energy Storage, ISSN 2352-152X, E-ISSN 2352-1538, Vol. 31, article id 101604Article in journal (Refereed)
    Abstract [en]

    Doping is the most effective strategy to improve the electrochemical performance of supercapacitors. Herein, we report the doping effect of Magnesium on structural instability of Ni-Co LDHs as the supercapacitor electrode material. The morphology of different compositions of magnesium are studied. The derived material with the Ni:Mg ratio of 1:1 displayed an excellent specific capacity of 624 Cg(-1) at current density of 10 Ag-1. Moreover, the specific capacity remained at 80% after 3000 cycles which suggest excellent cycle stability. An asymmetrc device was fabricated with N/M-2 as positive electrode and activated carbon cloth as negative electrode, which displayed a specific capacitance of 200 Fg(-1) at 0.25 Ag-1 with the energy density of 28 Whkg(-1). The device showed the capacitance retention of about 99% after 1000 cycles at 1 Ag-1. Therefore, improved structural

  • 5.
    Subramaniyam, Chandrasekar M.
    et al.
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology.
    Kang, Mina
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.
    Li, Jian
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.
    Mohammadi, Armin Vahid
    Department of Materials Science and Engineering, A.J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, Pennsylvania, USA.
    Hamedi, Mahiar
    KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology.
    Additive-free red phosphorus/Ti3C2TxMXene nanocomposite anodes for metal-ion batteries2022In: Energy Advances, E-ISSN 2753-1457, no 12, p. 999-1008Article in journal (Refereed)
    Abstract [en]

    Herein, we report on scalable, environmentally benign, and additive-free, high-performance anodes for alkali-metal-ion batteries (MIBs, where M = Li+, Na+, K+). The intercalators in these anodes are the red phosphorus (RP) nanoparticles of uniform size (~40 nm), which are dispersible and blend with water-dispersed Ti3C2Tx MXene, forming a highly viscous aqueous slurry to fabricate additive-free nanocomposite electrodes. We further enhanced their performance using a very low weight percentage of various carbonaceous nanomaterials. Our RP-MWCNT/MXene nanocomposite anodes exhibited enhanced ion transport and low charge transfer resistance, delivering specific capacities of 1293.7 mA h g-1 at 500 mA g-1 and 263.3 mA h g-1 at 2600 mA g-1 for 10 000 cycles in Li+ cells, 371.6 mA h g-1 at 500 mA g-1 in Na+ cells, and 732.8 mA h g-1 at 50 mA g-1 in K+ cells. Our work shows a path towards fabricating nanoarchitectured electrodes using sustainable materials to eliminate inert polymer binders, toxic processing solvents, and rare earth elements from the battery fabrication process for next-generation alkali-metal-ion batteries.

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