The composite electrode of LiFePO4 cathode materials modified with exfoliated graphene from expanded graphite for high power Li-ion batteries

2014 ◽  
Vol 2 (8) ◽  
pp. 2822-2829 ◽  
Author(s):  
Tiefeng Liu ◽  
Li Zhao ◽  
Junsheng Zhu ◽  
Bo Wang ◽  
Chenfeng Guo ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
High Power ◽  
Composite Electrode ◽  
Rate Capability ◽  
Expanded Graphite ◽  
Li Ion Batteries ◽  
Exfoliated Graphene ◽  
Excellent Electrochemical Performance ◽  
Lifepo4 Cathode ◽  
Li Ion

In recent years, copious papers have reported the fruitful modifications for LiFePO4-based composites and exhibited excellent electrochemical performance in term of rate capability and cycling stability.

scholarly journals NiS2 nanoparticles anchored on open carbon nanohelmets as an advanced anode for lithium-ion batteries

2020 ◽  
Vol 2 (1) ◽  
pp. 512-519
Author(s):  
D. D. Yang ◽  
M. Zhao ◽  
R. D. Zhang ◽  
Y. Zhang ◽  
C. C. Yang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Hybrid Material ◽  
Lithium Ion ◽  
Li Ion Batteries ◽  
Excellent Electrochemical Performance ◽  
Li Ion

The hybrid material of NiS2 nanoparticles anchored on carbon nanohelmets (NiS2/CNHs) shows excellent electrochemical performance in Li-ion batteries.

scholarly journals Directly Anodized Sulfur-Doped TiO2 Nanotubes as Improved Anodes for Li-ion Batteries

Batteries ◽  
2020 ◽  
Vol 6 (4) ◽  
pp. 51
Author(s):  
Davood Sabaghi ◽  
Mahmoud Madian ◽  
Ahmad Omar ◽  
Steffen Oswald ◽  
Margitta Uhlemann ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Discharge Capacity ◽  
Tio2 Nanotubes ◽  
Rate Capability ◽  
Pure Tio2 ◽  
Electrochemical Anodization ◽  
Li Ion Batteries ◽  
Doped Tio2 ◽  
Li Ion ◽  
Elemental Doping

TiO2 represents one of the promising anode materials for lithium ion batteries due to its high thermal and chemical stability, relatively high theoretical specific capacity and low cost. However, the electrochemical performance, particularly for mesoporous TiO2, is limited and must be further developed. Elemental doping is a viable route to enhance rate capability and discharge capacity of TiO2 anodes in Li-ion batteries. Usually, elemental doping requires elevated temperatures, which represents a challenge, particularly for sulfur as a dopant. In this work, S-doped TiO2 nanotubes were successfully synthesized in situ during the electrochemical anodization of a titanium substrate at room temperature. The electrochemical anodization bath represented an ethylene glycol-based solution containing NH4F along with Na2S2O5 as the sulfur source. The S-doped TiO2 anodes demonstrated a higher areal discharge capacity of 95 µAh·cm−2 at a current rate of 100 µA·cm−2 after 100 cycles, as compared to the pure TiO2 nanotubes (60 µAh·cm−2). S-TiO2 also exhibited a significantly improved rate capability up to 2500 µA·cm−2 as compared to undoped TiO2. The improved electrochemical performance, as compared to pure TiO2 nanotubes, is attributed to a lower impedance in S-doped TiO2 nanotubes (STNTs). Thus, the direct S-doping during the anodization process is a promising and cost-effective route towards improved TiO2 anodes for Li-ion batteries.

In-situ self-polymerization restriction to form core-shell LiFePO4/C nanocomposite with ultrafast rate capability for high-power Li-ion batteries

Nano Energy ◽  
2017 ◽  
Vol 39 ◽  
pp. 346-354 ◽  
Author(s):  
Hongbin Wang ◽  
Runwei Wang ◽  
Lijia Liu ◽  
Shang Jiang ◽  
Ling Ni ◽  
...  
Keyword(s):  
High Power ◽  
Rate Capability ◽  
Core Shell ◽  
Li Ion Batteries ◽  
Li Ion

Hierarchical porous Co3O4 nanosheet arrays directly grown on carbon cloth by an electrochemical route for high performance Li-ion batteries

2014 ◽  
Vol 38 (6) ◽  
pp. 2250-2253 ◽  
Author(s):  
Chao Cheng ◽  
Gang Zhou ◽  
Jun Du ◽  
Haiming Zhang ◽  
Di Guo ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
High Performance ◽  
Carbon Cloth ◽  
Li Ion Batteries ◽  
Structure And Morphology ◽  
Excellent Electrochemical Performance ◽  
Nanosheet Arrays ◽  
Hierarchical Porous ◽  
Li Ion ◽  
Co3o4 Nanosheet

Co3O4 nanosheet arrays were grown on carbon cloth homogeneously; excellent electrochemical performance was obtained due to the unique structure and morphology.

Nanostructured anode materials for Li-ion batteries

2008 ◽  
Vol 80 (11) ◽  
pp. 2283-2295 ◽  
Author(s):  
Nahong Zhao ◽  
Lijun Fu ◽  
Lichun Yang ◽  
Tao Zhang ◽  
Gaojun Wang ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Electrochemical Performance ◽  
Electrochemical Properties ◽  
Anode Materials ◽  
High Capacity ◽  
Rate Capability ◽  
Core Shell ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Cycling Behavior

This paper focuses on the latest progress in the preparation of a series of nanostructured anode materials in our laboratory and their electrochemical properties for Li-ion batteries. These anode materials include core-shell structured Si nanocomposites, TiO2 nanocomposites, novel MoO2 anode material, and carbon nanotube (CNT)-coated SnO2 nanowires (NWs). The substantial advantages of these nanostructured anodes provide greatly improved electrochemical performance including high capacity, better cycling behavior, and rate capability.

scholarly journals Surface-Engineered Li4Ti5O12 Nanostructures for High-Power Li-Ion Batteries

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Binitha Gangaja ◽  
Shantikumar Nair ◽  
Dhamodaran Santhanagopalan
Keyword(s):  
Surface Layer ◽  
High Power ◽  
Rate Capability ◽  
Temperature Cycling ◽  
High Rate ◽  
Li Ion Batteries ◽  
Li Ion Battery ◽  
Charging Rate ◽  
Extended Aging ◽  
Li Ion

AbstractMaterials with high-power charge–discharge capabilities are of interest to overcome the power limitations of conventional Li-ion batteries. In this study, a unique solvothermal synthesis of Li4Ti5O12 nanoparticles is proposed by using an off-stoichiometric precursor ratio. A Li-deficient off-stoichiometry leads to the coexistence of phase-separated crystalline nanoparticles of Li4Ti5O12 and TiO2 exhibiting reasonable high-rate performances. However, after the solvothermal process, an extended aging of the hydrolyzed solution leads to the formation of a Li4Ti5O12 nanoplate-like structure with a self-assembled disordered surface layer without crystalline TiO2. The Li4Ti5O12 nanoplates with the disordered surface layer deliver ultrahigh-rate performances for both charging and discharging in the range of 50–300C and reversible capacities of 156 and 113 mAh g−1 at these two rates, respectively. Furthermore, the electrode exhibits an ultrahigh-charging-rate capability up to 1200C (60 mAh g−1; discharge limited to 100C). Unlike previously reported high-rate half cells, we demonstrate a high-power Li-ion battery by coupling Li4Ti5O12 with a high-rate LiMn2O4 cathode. The full cell exhibits ultrafast charging/discharging for 140 and 12 s while retaining 97 and 66% of the anode theoretical capacity, respectively. Room- (25 °C), low- (− 10 °C), and high- (55 °C) temperature cycling data show the wide temperature operation range of the cell at a high rate of 100C.

Scalable synthesis of one-dimensional Na2Li2Ti6O14 nanofibers as ultrahigh rate capability anodes for lithium-ion batteries

2019 ◽  
Vol 6 (3) ◽  
pp. 646-653 ◽  
Author(s):  
Chao Wang ◽  
Xing Xin ◽  
Miao Shu ◽  
Shuiping Huang ◽  
Yang Zhang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Rate Capability ◽  
Lithium Ion ◽  
High Rate ◽  
Li Ion Batteries ◽  
High Rate Capability ◽  
One Dimensional ◽  
Long Cycle Life ◽  
Li Ion ◽  
Scalable Synthesis

Na2Li2Ti6O14 nanofibers presented superior electrochemical performance with high rate capability and long cycle life and can be regarded as a competitive anode candidate for advanced Li-ion batteries.

Influence of bio-derived agar addition on the electrochemical performance of LiFePO4 cathode powders for Li-ion batteries

2019 ◽  
Vol 45 (9) ◽  
pp. 12218-12224 ◽  
Author(s):  
Chung-Hsin Lu ◽  
Wen Yuan Li ◽  
T. Subburaj ◽  
Chang Ying Ou ◽  
P. Senthil Kumar
Keyword(s):  
Electrochemical Performance ◽  
Li Ion Batteries ◽  
Lifepo4 Cathode ◽  
Li Ion
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