scholarly journals Boosting Ultra-Fast Charge Battery Performance: Filling Porous nanoLi4Ti5O12 Particles with 3D Network of N-doped Carbons

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Jean-Christophe Daigle ◽  
Yuichiro Asakawa ◽  
Mélanie Beaupré ◽  
Vincent Gariépy ◽  
René Vieillette ◽  
...  
Keyword(s):  
Electronic Conductivity ◽  
Lithium Ion ◽  
Surface Reactivity ◽  
Fast Charge ◽  
3D Network ◽  
Fast Charging ◽  
Carbon Coated ◽  
Unique Approach ◽  
First Time ◽  
Lithium Titanium

AbstractLithium titanium oxide (Li4Ti5O12)-based cells are a promising technology for ultra-fast charge-discharge and long life-cycle batteries. However, the surface reactivity of Li4Ti5O12 and lack of electronic conductivity still remains problematic. One of the approaches toward mitigating these problems is the use of carbon-coated particles. In this study, we report the development of an economical, eco-friendly, and scalable method of making a homogenous 3D network coating of N-doped carbons. Our method makes it possible, for the first time, to fill the pores of secondary particles with carbons; we reveal that it is possible to cover each primary nanoparticle. This unique approach permits the creation of lithium-ion batteries with outstanding performances during ultra-fast charging (4C and 10C), and demonstrates an excellent ability to inhibit the degradation of cells over time at 1C and 45 °C. Furthermore, using this method, we can eliminate the addition of conductive carbons during electrode preparation, and significantly increase the energy density (by weight) of the anode.

scholarly journals PEDOT-Coated Red Phosphorus Nanosphere Anodes for Pseudocapacitive Potassium-Ion Storage

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1732
Author(s):  
Dan Zhao ◽  
Qian Zhao ◽  
Zhenyu Wang ◽  
Lan Feng ◽  
Jinying Zhang ◽  
...  
Keyword(s):  
Surface Engineering ◽  
Electronic Conductivity ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Average Diameter ◽  
Potassium Ion ◽  
Red Phosphorus ◽  
Fast Charging ◽  
Potential Alternative ◽  
High Theoretical Capacity

Potassium-ion batteries (KIBs) have come up as a potential alternative to lithium-ion batteries due to abundant potassium storage in the crust. Red phosphorus is a promising anode material for KIBs with abundant resources and high theoretical capacity. Nevertheless, large volume expansion, low electronic conductivity, and limited K+ charging speed in red phosphorus upon cycling have severely hindered the development of red phosphorus-based anodes. To obtain improved conductivity and structural stability, surface engineering of red phosphorus is required. Poly(3,4-ethylenedioxythiophene) (PEDOT)-coated red phosphorus nanospheres (RPNP@PEDOT) with an average diameter of 60 nm were synthesized via a facile solution-phase approach. PEDOT can relieve the volume change of red phosphorus and promote electron/ion transportation during charge−discharge cycles, which is partially corroborated by our DFT calculations. A specific capacity of 402 mAh g−1 at 0.1 A g−1 after 40 cycles, and a specific capacity of 302 mAh g−1 at 0.5 A g−1 after 275 cycles, were achieved by RPNP@PEDOT anode with a high pseudocapacitive contribution of 62%. The surface–interface engineering for the organic–inorganic composite of RPNP@PEDOT provides a novel perspective for broad applications of red phosphorus-based KIBs in fast charging occasions.

scholarly journals Sodium Induced Morphological Changes of Carbon Coated TiO2 Anatase Nanoparticles – High-Performance Materials for Na-Ion Batteries

MRS Advances ◽  
2020 ◽  
Vol 5 (43) ◽  
pp. 2221-2229
Author(s):  
G. Greco ◽  
S. Passerini
Keyword(s):  
Large Scale ◽  
Morphological Changes ◽  
Low Cost ◽  
Cell Structure ◽  
Active Material ◽  
Lithium Ion ◽  
Composite Electrodes ◽  
Carbon Coated ◽  
Anatase Nanoparticles ◽  
First Time

AbstractThe most promising candidate as an everyday alternative to lithium-ion batteries (LIBs) are sodium-ion batteries (NIBs). This is not only due to Na abundance, but also because the main principles and cell structure are very similar to LIBs. Due to these benefits, NIBs are expected to be used in applications related to large-scale energy storage systems and other applications not requiring top-performance in terms of volumetric capacity. One important issue that has hindered the large scale application of NIBs is the anode material. Graphite and silicon, which have been widely applied as anodes in NIBs, do not show great performance. Hard carbons look very promising in terms of their abundance and low cost, but they tend to suffer from instability, in particular over the long term. In this work we explore a carbon-coated TiO2 nanoparticle system that looks very promising in terms of stability, abundance, low-cost, and most importantly that safety of the cell, since it does not suffer from potential sodium plating during cycling. Maintaining a nano-size and consistent morphology of the active material is a crucial parameter for maintaining a well-functioning cell upon cycling. In this work we applied Anomalous Small Angle X-Ray Scattering (ASAXS) for the first time at the Ti K-edge of TiO2 anatase nanoparticles on different cycled composite electrodes in order to have a complete morphological overview of the modifications induced by sodiation and desodiation. This work also demonstrates for the first time that the nanosize of the TiO2 is maintained upon cycling, which is in agreement with the electrochemical stability.

scholarly journals Novel synthesis and electrochemical investigations of ZnO/C composites for lithium-ion batteries

2021 ◽  
Author(s):  
E. Thauer ◽  
G. S. Zakharova ◽  
E. I. Andreikov ◽  
V. Adam ◽  
S. A. Wegener ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
Nitrogen Atmosphere ◽  
Ex Situ ◽  
Ion Diffusion ◽  
Storage Mechanism ◽  
Treatment Conditions ◽  
One Step ◽  
First Time

AbstractFor the first time, ZnO/C composites were synthesized using zinc glycerolate as a precursor through one-step calcination under a nitrogen atmosphere. The effect of the heat treatment conditions on the structure, composition, morphology as well as on the electrochemical properties regarding application in lithium-ion batteries are investigated. The products obtained by calcination of the precursor in nitrogen at 400—800 °C consist of zinc oxide nanoparticles and amorphous carbon that is in-situ generated from organic components of the glycerolate precursor. When used as anode material for lithium-ion batteries, the as-prepared ZnO/C composite synthesized at a calcination temperature of 700 °C delivers initial discharge and charge capacities of 1061 and 671 mAh g−1 at a current rate of 100 mA g−1 and hence 1.5 times more than bare ZnO, which reaches only 749/439 mAh g−1. The native carbon improves the conductivity, allowing efficient electronic conductivity and Li-ion diffusion. By means of ex-situ XRD studies a two-step storage mechanism is proven.

Enhanced fast charge–discharge performance of Li4Ti5O12 as anode materials for lithium-ion batteries by Ce and CeO2 modification using a facile method

RSC Advances ◽  
2015 ◽  
Vol 5 (47) ◽  
pp. 37367-37376 ◽  
Author(s):  
Ting-Feng Yi ◽  
Jin-Zhu Wu ◽  
Mei Li ◽  
Yan-Rong Zhu ◽  
Ying Xie ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
Solid State Method ◽  
Discharge Performance ◽  
Fast Charge ◽  
Improved Performance ◽  
Charge Discharge

Ce and CeO2in situ modified Li4Ti5O12 with fast charge–discharge performance for lithium-ion batteries were prepared by a solid-state method. The improved performance are found to be due to the increased ionic and electronic conductivity.

Core–shell Si/Cu nanocomposites synthesized by self-limiting surface reaction as anodes for lithium ion batteries

2017 ◽  
Vol 10 (03) ◽  
pp. 1750025 ◽  
Author(s):  
Kaiqi Xu ◽  
Zhizhen Zhang ◽  
Wei Su ◽  
Xuejie Huang
Keyword(s):  
Lithium Ion Batteries ◽  
Surface Reaction ◽  
Coulombic Efficiency ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
Core Shell ◽  
Cu Nanoparticles ◽  
Capacity Retention ◽  
First Time ◽  
Limiting Surface

Core–shell Si/Cu nanocomposites were synthesized via a flexible self-limiting surface reaction without extra reductant for the first time. The nano Si was uniformly coated with Cu nanoparticles with a diameter of 5–10[Formula: see text]nm, which can enhance the electronic conductivity of the nanocomposites and buffer the huge volume change during charge/discharge owing to its high ductility. Benefited from the unique structure, the Si/Cu nanocomposites exhibited a good electrochemical performance as anodes for lithium ion batteries, which exhibited a capacity retention of 656[Formula: see text]mAh/g after 50 cycles and a coulombic efficiency of more than 99%.

scholarly journals Boosting fast energy storage by synergistic engineering of carbon and deficiency

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Shengjue Deng ◽  
He Zhu ◽  
Guizhen Wang ◽  
Mi Luo ◽  
Shenghui Shen ◽  
...  
Keyword(s):  
Oxygen Deficiency ◽  
Electronic Conductivity ◽  
High Capacity ◽  
Lithium Ion ◽  
Diffusion Path ◽  
Activation Process ◽  
Ion Diffusion ◽  
Battery Materials ◽  
Fast Charging

AbstractExploring advanced battery materials with fast charging/discharging capability is of great significance to the development of modern electric transportation. Herein we report a powerful synergistic engineering of carbon and deficiency to construct high-quality three/two-dimensional cross-linked Ti2Nb10O29−x@C composites at primary grain level with conformal and thickness-adjustable boundary carbon. Such exquisite boundary architecture is demonstrated to be capable of regulating the mechanical stress and concentration of oxygen deficiency for desired performance. Consequently, significantly improved electronic conductivity and enlarged lithium ion diffusion path, shortened activation process and better structural stability are realized in the designed Ti2Nb10O29−x@C composites. The optimized Ti2Nb10O29−x@C composite electrode shows fast charging/discharging capability with a high capacity of 197 mA h g−1 at 20 C (∼3 min) and excellent long-term durability with 98.7% electron and Li capacity retention over 500 cycles. Most importantly, the greatest applicability of our approach has been demonstrated by various other metal oxides, with tunable morphology, structure and composition.

Yolk–shell-structured microspheres composed of N-doped-carbon-coated NiMoO4 hollow nanospheres as superior performance anode materials for lithium-ion batteries

Nanoscale ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 631-638 ◽  
Author(s):  
Gi Dae Park ◽  
Jeong Hoo Hong ◽  
Jung-Kul Lee ◽  
Yun Chan Kang
Keyword(s):  
Transition Metal ◽  
Metal Oxide ◽  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Lithium Ion ◽  
Transition Metal Oxide ◽  
Superior Performance ◽  
Hollow Nanospheres ◽  
Carbon Coated ◽  
First Time

Herein, for the first time, yolk–shell-structured microspheres consisting of N-doped-carbon-coated binary transition-metal oxide hollow nanospheres are designed as anode materials for lithium-ion batteries.

scholarly journals Carbon Coated Porous Titanium Niobium Oxides as Anode Materials of Lithium-Ion Batteries for Extreme Fast Charge Applications

2020 ◽  
Vol 3 (6) ◽  
pp. 5657-5665 ◽  
Author(s):  
Hailong Lyu ◽  
Jianlin Li ◽  
Tao Wang ◽  
Bishnu P. Thapaliya ◽  
Shuang Men ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Lithium Ion ◽  
Porous Titanium ◽  
Fast Charge ◽  
Niobium Oxides ◽  
Carbon Coated
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