MnCo2O4 decorated Magnéli phase titanium oxide as a carbon-free cathode for Li–O2 batteries

2017 ◽  
Vol 5 (37) ◽  
pp. 19991-19996 ◽  
Author(s):  
Xuecheng Cao ◽  
Zhihui Sun ◽  
Xiangjun Zheng ◽  
Jinghua Tian ◽  
Chao Jin ◽  
...  
Keyword(s):  
Titanium Oxide ◽  
Electrocatalytic Activity ◽  
High Performance ◽  
Electronic Conductivity ◽  
Synergistic Interaction ◽  
High Electronic Conductivity ◽  
Magnéli Phase ◽  
First Time ◽  
Magneli Phase

The application of MnCo2O4 (MCO) decorated Ti4O7 as a carbon-free cathode for Li–O2 batteries is reported for the first time. The high performance of Ti4O7/MCO cathode is attributed to the high electronic conductivity of Ti4O7, the high electrocatalytic activity of MCO and the synergistic interaction between Ti4O7 and MCO toward ORR and OER.

Reduction in the Thermal Conductivity of Thermoelectric Titanium Oxide by Introduction of Planar Defects

2009 ◽  
Vol 1218 ◽  
Author(s):  
Shunta Harada ◽  
Katsushi Tanaka ◽  
Haruyuki Inui
Keyword(s):  
Thermal Conductivity ◽  
Titanium Oxide ◽  
Hot Pressing ◽  
Oxygen Deficiency ◽  
Nominal Composition ◽  
Titanium Oxides ◽  
X Ray Diffraction ◽  
Planar Defects ◽  
Magnéli Phase ◽  
Magneli Phase

AbstractThermoelectric properties of a homologous series of Magnéli phase titanium oxides TinO2n-1 (n = 2, 3..) have been investigated. Dense polycrystalline specimens with nominal composition of TiO2-x (x = 0.10, 0.20) have been prepared by conventional hot-pressing. X-ray diffraction analysis has revealed that prepared specimens are slightly reduced during hot-pressing. Electrical conduction is of n-type for all prepared titanium oxides and electrical resistivity and absolute values of Seebeck coefficient decrease with increasing oxygen deficiency. The carrier concentration of Magnéli phase titanium oxide increases with increasing oxygen deficiency. Lattice thermal conductivity decreases with increasing oxygen deficiency by more than 60% at room temperature and 40% at 773K compared to TiO2, which can be due to the presence of dense planar defects. The largest thermoelectric figure of merit Z, 1.6×10-4 K-1 at 773K, was obtained in TiO1.90 hot pressed specimen.

Phosphorus-doped porous hollow carbon nanorods for high-performance sodium-based dual-ion batteries

2020 ◽  
Vol 8 (7) ◽  
pp. 4007-4016 ◽  
Author(s):  
Xiaoyan Wang ◽  
Shaofeng Wang ◽  
Kaixiang Shen ◽  
Shenggong He ◽  
Xianhua Hou ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Structural Stability ◽  
High Performance ◽  
Electronic Conductivity ◽  
High Electronic Conductivity ◽  
Hollow Carbon ◽  
Phosphorus Doped

Phosphorus-doped hollow carbon nanorods with high electronic conductivity can maintain excellent structural stability and endow outstanding electrochemical performance in sodium-based dual-ion batteries.

Topological semimetal porous carbon as a high-performance anode for Li-ion batteries

2019 ◽  
Vol 7 (23) ◽  
pp. 14253-14259 ◽  
Author(s):  
Huanhuan Xie ◽  
Yu Qie ◽  
Muhammad Imran ◽  
Qiang Sun
Keyword(s):  
Lithium Ion Battery ◽  
Porous Carbon ◽  
High Performance ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
Li Ion Batteries ◽  
High Electronic Conductivity ◽  
Topological Semimetal ◽  
Li Ion ◽  
Battery Anode

Motivated by the advantages of inherent high electronic conductivity and ordered porosity of topological semimetal monoclinic C16 (m-C16), we explore its possible use as a lithium-ion battery anode material.

Platinum–titanium alloy catalysts on a Magnéli-phase titanium oxide support for improved durability in Polymer Electrolyte Fuel Cells

2013 ◽  
Vol 223 ◽  
pp. 183-189 ◽  
Author(s):  
Tsutomu Ioroi ◽  
Tomoki Akita ◽  
Masafumi Asahi ◽  
Shin-ichi Yamazaki ◽  
Zyun Siroma ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Titanium Oxide ◽  
Polymer Electrolyte Fuel Cells ◽  
Oxide Support ◽  
Magnéli Phase ◽  
Alloy Catalysts ◽  
Magneli Phase

Magneli Phase Titanium Oxide: Electrochemical Routes and Characterisation

2014 ◽  
Vol 61 (4) ◽  
pp. 393-404 ◽  
Author(s):  
P. Dunne ◽  
M. Mieszala ◽  
V. Le Nader ◽  
L. Philippe ◽  
J. Michler
Keyword(s):  
Titanium Oxide ◽  
Magnéli Phase ◽  
Magneli Phase

scholarly journals High-Performance Lithium Sulfur Batteries Based on Multidimensional Graphene-CNT-Nanosulfur Hybrid Cathodes

Batteries ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 26
Author(s):  
Álvaro Doñoro ◽  
Álvaro Muñoz-Mauricio ◽  
Vinodkumar Etacheri
Keyword(s):  
High Performance ◽  
Coulombic Efficiency ◽  
Electronic Conductivity ◽  
Specific Capacity ◽  
Synthesis Method ◽  
Graphene Nanoplatelets ◽  
Practical Implementation ◽  
Electrochemical Performances ◽  
High Electronic Conductivity ◽  
Lithium Sulfur

Although lithium-sulfur (Li-S) batteries are one of the promising candidates for next-generation energy storage, their practical implementation is limited by rapid capacity fading due to lithium polysulfide (LiPSs) formation and the low electronic conductivity of sulfur. Herein, we report a high-performance lithium-sulfur battery based on multidimensional cathode architecture consisting of nanosulfur, graphene nanoplatelets (2D) and multiwalled carbon nanotubes (1D). The ultrasonic synthesis method results in the generation of sulfur nanoparticles and their intercalation into the multilayered graphene nanoplatelets. The optimized multidimensional graphene-sulfur-CNT hybrid cathode (GNS58-CNT10) demonstrated a high specific capacity (1067 mAh g−1 @ 50 mA g−1), rate performance (539 @ 1 A g−1), coulombic efficiency (~95%) and cycling stability (726 mAh g−1 after 100 cycles @ 200 mA g−1) compared to the reference cathode. Superior electrochemical performances are credited to the encapsulation of nanosulfur between the individual layers of graphene nanoplatelets with high electronic conductivity, and effective polysulfide trapping by MWCNT bundles.

scholarly journals Carbon-Coated Three-Dimensional MXene/Iron Selenide Ball with Core–Shell Structure for High-Performance Potassium-Ion Batteries

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Su Hyun Yang ◽  
Yun Jae Lee ◽  
Heemin Kang ◽  
Seung-Keun Park ◽  
Yun Chan Kang
Keyword(s):  
High Performance ◽  
Electrode Materials ◽  
High Current Density ◽  
Electronic Conductivity ◽  
Three Dimensional ◽  
Ultrasonic Spray Pyrolysis ◽  
Reversible Capacity ◽  
Potassium Ion ◽  
Synthetic Strategy ◽  
High Electronic Conductivity

AbstractTwo-dimensional (2D) MXenes are promising as electrode materials for energy storage, owing to their high electronic conductivity and low diffusion barrier. Unfortunately, similar to most 2D materials, MXene nanosheets easily restack during the electrode preparation, which degrades the electrochemical performance of MXene-based materials. A novel synthetic strategy is proposed for converting MXene into restacking-inhibited three-dimensional (3D) balls coated with iron selenides and carbon. This strategy involves the preparation of Fe2O3@carbon/MXene microspheres via a facile ultrasonic spray pyrolysis and subsequent selenization process. Such 3D structuring effectively prevents interlayer restacking, increases the surface area, and accelerates ion transport, while maintaining the attractive properties of MXene. Furthermore, combining iron selenides and carbon with 3D MXene balls offers many more sites for ion storage and enhances the structural robustness of the composite balls. The resultant 3D structured microspheres exhibit a high reversible capacity of 410 mAh g−1 after 200 cycles at 0.1 A g−1 in potassium-ion batteries, corresponding to the capacity retention of 97% as calculated based on 100 cycles. Even at a high current density of 5.0 A g−1, the composite exhibits a discharge capacity of 169 mAh g−1.

A graphene-like metallic cathode host for long-life and high-loading lithium–sulfur batteries

2016 ◽  
Vol 3 (2) ◽  
pp. 130-136 ◽  
Author(s):  
Quan Pang ◽  
Dipan Kundu ◽  
Linda F. Nazar
Keyword(s):  
High Performance ◽  
Electronic Conductivity ◽  
High Loading ◽  
Host Materials ◽  
High Electronic Conductivity ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Long Life ◽  
Lithium Sulfur

Nanostructured sulfur host materials that embrace both high electronic conductivity and strong chemisorption towards polysulfides are central to enable high performance Li–S batteries.

Sign in / Sign up

Export Citation Format

Share Document