Cr0.5Nb24.5O62 Nanowires with High Electronic Conductivity for High-Rate and Long-Life Lithium-Ion Storage

Combination of materials with fast Li-ion storage in both positive and negative electrodes results in a high-rate lithium ion battery full cell with a long life-span.

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High-Rate Charge/Discharge Properties of Li Ion Secondary Battery Using V2O5/Carbon Composite Electrodes with Carbon Fiber

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.301.159 ◽

2006 ◽

Vol 301 ◽

pp. 159-162

Author(s):

Akira Kuwahara ◽

Shinya Suzuki ◽

Masaru Miyayama

Keyword(s):

Carbon Fiber ◽

Current Density ◽

High Current Density ◽

Fiber Composite ◽

Electronic Conductivity ◽

Lithium Ion ◽

High Rate ◽

Composite Electrodes ◽

High Electronic Conductivity ◽

Charge Discharge

The charge/discharge properties of V2O5/carbon composites with controlled microstructures were investigated to achieve a high-rate lithium electrode performance. Composite electrodes were synthesized by mixing a V2O5 sol, carbon and a surfactant, followed by drying. V2O5/AB (acetylene black) and V2O5/VGCF (vapor-grown carbon fiber) composite electrodes showed high-rate charge/discharge properties only when they had very high carbon contents. V2O5/ (AB and VGCF) composite electrodes with controlled microstructures exhibited a discharge capacity of 245 mA·h·g-1 at a high current density of 40 A·g-1, which was approximately 70% of that at a low current density of 100 mA·g-1. The improvement in the high-rate charge/discharge properties was attributed to the short lithium ion diffusion distance, large reaction area and high electronic conductivity of those composite electrodes.

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Porous Ti2Nb10O29−x Microspheres Wrapped by Holey-Reduced Graphene Oxide as Superior Anode Material for High-rate Performance Lithium-ion Storage

NANO ◽

10.1142/s1793292020500952 ◽

2020 ◽

Vol 15 (07) ◽

pp. 2050095

Author(s):

Nan Luo ◽

Guoliang Chen ◽

Yunfan Shang ◽

Suyang Lu ◽

Jun Mei ◽

...

Keyword(s):

Anode Material ◽

Oxygen Vacancies ◽

Electronic Conductivity ◽

Lithium Ion ◽

High Rate ◽

Cyclic Stability ◽

Rate Performance ◽

Reduced Graphene ◽

Ion Storage ◽

High Rate Performance

Ti2[Formula: see text][Formula: see text] (TNO) is considered as a potential anode material due to its high capacity/power density and reliable safety. However, its poor electronic conductivity restricts its rate performance, which is important for its application in electric vehicles (EVs). In this study, we fabricated a hybrid of Ti2[Formula: see text][Formula: see text]/holey-reduced graphene oxide (TNOx/HRGO) by a two-step method. In the structure of TNOx/HRGO, TNOx microspheres with oxygen vacancies are wrapped by gossamer-like HRGO. The oxygen vacancies of TNOx and the high conductivity of HRGO can effectively enhance the electronic conductivity of the TNOx/HRGO hybrid, and the HRGO holes are beneficial for the transmission of lithium-ion ([Formula: see text]). The synergy effect of above features improves the rate performance of the TNOx/HRGO hybrid. In addition, the existence of HRGO can buffer volume expansion during the insertion processes of [Formula: see text], which can improve cyclic stability of the TNOx/HRGO hybrid. Consequently, the TNOx/HRGO electrode has excellent lithium-ion storage capacity, with high-rate performance (242[Formula: see text]mAh/g at 10∘C, 225[Formula: see text]mAh/g at 20∘C and 173[Formula: see text]mAh/g at 40∘C) and excellent cyclic stability (98.0% capacity retention after 300 cycles at 10∘C). This work reveals that TNOx/HRGO can be a potential anode material for high-rate-performance lithium-ion storage.

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Hollow Si/SiOxnanosphere/nitrogen-doped carbon superstructure with a double shell and void for high-rate and long-life lithium-ion storage

Journal of Materials Chemistry A ◽

10.1039/c8ta00010g ◽

2018 ◽

Vol 6 (17) ◽

pp. 8039-8046 ◽

Cited By ~ 63

Author(s):

Chao Yang ◽

Yelong Zhang ◽

Jinhui Zhou ◽

Chunfu Lin ◽

Fan Lv ◽

...

Keyword(s):

Lithium Ion ◽

High Rate ◽

Volume Changes ◽

Nitrogen Doped ◽

New Class ◽

Ion Storage ◽

Long Life ◽

Nitrogen Doped Carbon

We report a new class of Si/SiOx@void@nitrogen-doped carbon double-shelled hollow superstructure electrodes that are capable of accommodating huge volume changes without pulverization during cycling.

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Enhanced reversible capability of a macroporous ZnMn2O4/C microsphere anode with a water-soluble binder for long-life and high-rate lithium-ion storage

Inorganic Chemistry Frontiers ◽

10.1039/c9qi00091g ◽

2019 ◽

Vol 6 (6) ◽

pp. 1535-1545 ◽

Cited By ~ 15

Author(s):

Huan Li ◽

Tianbo Yang ◽

Bo Jin ◽

Ming Zhao ◽

Enmei Jin ◽

...

Keyword(s):

Lithium Ion Batteries ◽

Lithium Ion ◽

Water Soluble ◽

High Rate ◽

Cycle Performance ◽

Ion Storage ◽

Long Life

ZnMn2O4 and carbon are mixed uniformly to form macroporous ZnMn2O4/C microspheres consisting of many tiny nanoparticles. The macroporous ZnMn2O4/C microsphere anode with a CMC binder shows superior cycle performance in lithium-ion batteries.

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Synthesis of nanoparticle-assembled Zn3(VO4)2 porous networks via a facile coprecipitation method for high-rate and long-life lithium-ion storage

Dalton Transactions ◽

10.1039/c9dt04503a ◽

2020 ◽

Vol 49 (7) ◽

pp. 2112-2120 ◽

Cited By ~ 3

Author(s):

Yuanxiang Gu ◽

Yingjie Han ◽

Wenqi Hou ◽

Huixia Lan ◽

Heng Zhang ◽

...

Keyword(s):

Electrochemical Properties ◽

Rate Capability ◽

Lithium Ion ◽

Reversible Capacity ◽

High Rate ◽

High Reversible Capacity ◽

Porous Networks ◽

Ion Storage ◽

Long Life ◽

Good Cycling Stability

Nanoparticle-assembled Zn3(VO4)2 porous networks exhibited excellent electrochemical properties, including high reversible capacity, good cycling stability and excellent rate capability.

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Surface nitridation of Li4Ti5O12 by thermal decomposition of urea to improve quick charging capability of lithium ion batteries

Scientific Reports ◽

10.1038/s41598-021-92550-z ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Jihyun Jang ◽

Tae Hun Kim ◽

Ji Heon Ryu

Keyword(s):

Lithium Ion Batteries ◽

Coulombic Efficiency ◽

Electronic Conductivity ◽

Rate Capability ◽

Negative Electrode ◽

Lithium Ion ◽

High Rate ◽

High Electronic Conductivity ◽

Negative Electrode Material ◽

Initial Coulombic Efficiency

AbstractAs the application of lithium-ion batteries in electric vehicles increases, the demand for improved charging characteristics of batteries is also increasing. Lithium titanium oxide (Li4Ti5O12, LTO) is a negative electrode material with high rate characteristics, but further improvement in rate characteristics is needed for achieving the quick-charging performance required by electric vehicle markets. In this study, the surface of LTO was coated with a titanium nitride (TiN) layer using urea and an autogenic reactor, and electrochemical performance was improved (initial Coulombic efficiency and the rate capability were improved from 95.6 to 4.4% for pristine LTO to 98.5% and 53.3% for urea-assisted TiN-coated LTO, respectively. We developed a process for commercial production of surface coatings using eco-friendly material to further enhance the charging performance of LTO owing to high electronic conductivity of TiN.

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