scholarly journals A novel low-temperature solid-state route for nanostructured cubic garnet Li7La3Zr2O12 and its application to Li-ion battery

RSC Advances ◽  
2016 ◽  
Vol 6 (67) ◽  
pp. 62656-62667 ◽  
Author(s):  
P. Jeevan Kumar ◽  
K. Nishimura ◽  
M. Senna ◽  
A. Düvel ◽  
P. Heitjans ◽  
...  
Keyword(s):  
Solid State ◽  
Low Temperature ◽  
Discharge Capacity ◽  
Li Ion Battery ◽  
Initial Discharge Capacity ◽  
Solid State Route ◽  
Initial Discharge ◽  
Model Cell ◽  
Li Ion

Garnet Li7La3Zr2O12 nanoparticles with 1 mass% Al were prepared via a solid-state route at 750 °C within 3 h. A model cell sandwiched by Li and LiCoO2 exhibited initial discharge capacity of 64 μA h cm−2 μm−1, being 93% of LiCoO2 theoretical value.

Preparing LiFePO4 Using Recovered Materials from Waste Li-Ion Battery

2013 ◽  
Vol 726-731 ◽  
pp. 2940-2944 ◽  
Author(s):  
Feng Pei ◽  
Yue Wu ◽  
Wen Hua Zhang ◽  
Xu Tian ◽  
Ji Yu
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Raw Material ◽  
Molar Ratio ◽  
Li Ion Battery ◽  
Optimal Conditions ◽  
Initial Discharge Capacity ◽  
Capacity Retention ◽  
Initial Discharge ◽  
Li Ion

LiFePO4 was prepared using recovered materials from waste Li-ion battery. The recovered materials after treatment was mixed with Li2CO3, Fe (NO3) 3·9H2O and NH4H2PO4 to adjust the Li/Fe/P molar ratio equal to 1.05/1/1. The raw material was mixed with super-p and calcined in muffle to get LiFePO4 by a solid-state reaction. Optimal conditions were: 700°C, N2 ambience, 10h, and Fe/C=1/1.5 (mol). The characterization results showed that the product was irregular particles with size 5-10μm and good dispersion. When discharged in the range of 2.2~4.2V, the initial discharge capacity was 141.4mAh/g at 0.1C, 103.1mAh/g at 1C. The capacity retention was 97.2% after 300 cycles at 1C showing satisfactory stability.

On Improving the Cycling Stability of P2-Type Na0.67Ni0.33Mn0.67O2 Cathode Material By Ti-Substitution for Na-Ion Batteries

2019 ◽  
Author(s):  
Debanjana Pahari ◽  
Sreeraj Puravankara
Keyword(s):  
Solid State ◽  
Cathode Material ◽  
Discharge Capacity ◽  
Synthesis Method ◽  
Cycling Stability ◽  
Solid State Synthesis ◽  
Initial Discharge Capacity ◽  
Initial Discharge ◽  
Ti Substitution ◽  
Solid State Synthesis Method

A novel cathode material with Ti-substitution on Ni site, P2-type Na0.67Ni0.25Ti0.08Mn0.67O2 has been synthesized via solid-state synthesis method and characterized electrochemically. Na0.67Ni0.25Ti0.08Mn0.67O2 electrodes have been observed tobe highly reversible at higher voltage ranges. The electrodes have an initial discharge capacity of 125 mAhg-1and can retain around 84% of this capacity (105 mAhg-1) even after 50 cycles at 0.1C when cycled at an uppercut-off voltage of 4.3 V. Na0.67Ni0.25Ti0.08Mn0.67O2 electrodes are believed to suppress the irreversible P2-O2 transformation by diverting the charging reaction through a more reversible P2-OP4transition.

Al2O3 Coating of Spherical LiNi0.8Co0.2O2 for Li-Ion Batteries

2007 ◽  
Vol 336-338 ◽  
pp. 517-520 ◽  
Author(s):  
Xiang Ming He ◽  
Wei Hua Pu ◽  
Fang Hui Zhao ◽  
Jie Rong Ying ◽  
Chang Yin Jiang ◽  
...  
Keyword(s):  
Discharge Capacity ◽  
Lithium Ion ◽  
Surface Element ◽  
Li Ion Batteries ◽  
Initial Discharge Capacity ◽  
Element Analysis ◽  
Initial Discharge ◽  
Li Ion ◽  
Controlled Crystallization ◽  
First Time

Spherical LiNi0.8Co0.2O2 powders with particle size of 8~10μm were prepared based on controlled crystallization, and coated with Al2O3 by Al(OH)3 sol, that was prepared from Al(NO3)3 and NaOH, at first time. SEM, XRD and surface element analysis showed that the nano-sized Al2O3 was coated uniformly on the surface of LiNi0.8Co0.2O2 powder. At 25 °C, the initial discharge capacity decreased from 160 to 149 mAh g-1 after coating of Al2O3. The initial discharge capacity decreased from 168 to 163 mAh g-1 after coating of Al2O at 55 °C. After coating of Al2O3, the capacity retentions increased from 83.8% to 92.6% at the 50th cycle at 25°C, and from 36.3% to 90.8% at the 10th cycle at 55°C. This paves effective way to improve the performance of LiNi0.8Co0.2O2 material for rechargeable lithium ion batteries.

On Improving the Cycling Stability of P2-Type Na0.67Ni0.33Mn0.67O2 Cathode Material By Ti-Substitution for Na-Ion Batteries

2019 ◽  
Author(s):  
Debanjana Pahari ◽  
Sreeraj Puravankara
Keyword(s):  
Solid State ◽  
Cathode Material ◽  
Electrode Materials ◽  
Cycling Stability ◽  
Partial Substitution ◽  
Li Ion Batteries ◽  
Initial Discharge Capacity ◽  
Initial Discharge ◽  
Li Ion ◽  
Ti Substitution

The extensive studies over the last decade have established Na-ion batteries (NIBs) as one of the cheaperalternatives to Li-ion batteries. P2-type Na0.67Ni0.33Mn0.67O2 has stood out among layered oxidebased electrode materials providing the best over-all electrochemical performance. The electrodes can exertup to 92.5% of its theoretical capacity (160 mAhg-1) at a voltage higher than 3 V accounted for the Ni2+/Ni4+redox. However, at higher voltages, electrodes suffer irreversibility due to P2-O2 structural transition.Recent studies in suppressing this transition by partial substitution with various metals on either Ni or Mnlattice site have suggested enhancing cycling stability. In this study, a novel cathode material with Ti-substitution on Ni site, P2-type Na0.67Ni0.25Ti0.08Mn0.67O2 has been synthesized via solid-state synthesismethod and characterized electrochemically. Na0.67Ni0.25Ti0.08Mn0.67O2 electrodes have been observed tobe highly reversible at higher voltage ranges. The electrodes have an initial discharge capacity of 125 mAhg-1and can retain around 84% of this capacity (105 mAhg-1) even after 50 cycles at 0.1C when cycled at an uppercut-off voltage of 4.3 V. Na0.67Ni0.25Ti0.08Mn0.67O2 electrodes are believed to suppress the irreversible P2-O2 transformation by diverting the charging reaction through a more reversible P2-OP4transition.

Optimal Charge and Discharge Capacity Effects of the Sintering Process on LiMn2O4 by the Solid-State Reaction Method

2013 ◽  
Vol 377 ◽  
pp. 141-145 ◽  
Author(s):  
Yen Chun Liu ◽  
Mao Chieh Chi ◽  
Ming Cheng Liu
Keyword(s):  
Solid State ◽  
Discharge Capacity ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Discharge Voltage ◽  
Operating Voltage ◽  
Initial Discharge Capacity ◽  
Sintering Process ◽  
Charge Voltage ◽  
Initial Discharge

This study investigates the optimal charge and discharge capacity of the sintering process on the lithium battery spinel - LiMn2O4. Both Li2CO3 and Mn3O4 are utilized to synthesize the cathode material LiMn2O4 using the solid-state reaction. Cathode materials are processed to fabricate batteries at temperatures ranging from 800°C to 900°C. Test results reveal that the highest initial discharge capacity of 105.19 mAhg-1 (theoretically at 148 mAhg-1) has been obtained at the temperature of 850°C in the sintering process for synthesis of LiMn2O4. In addition, the initial discharge capacity can be increased to 140.51 mAhg-1 with both overdosing the amount of lithium by 2% and increasing the range of operating voltage. The increasing of the charge voltage ranges from 4.5V to 4.8V and reducing of the discharge voltage ranges from 3.0V to 2.8V.

Effect of sulfur doping on structural reversibility and cycling stability of a Li2MnSiO4 cathode material

2018 ◽  
Vol 47 (35) ◽  
pp. 12337-12344 ◽  
Author(s):  
Xia Wu ◽  
Shi-Xi Zhao ◽  
Lü-Qiang Yu ◽  
Jin-Lin Yang ◽  
Ce-Wen Nan
Keyword(s):  
Cathode Material ◽  
Discharge Capacity ◽  
Cycling Stability ◽  
Initial Discharge Capacity ◽  
Sulfur Doping ◽  
Initial Discharge ◽  
Excellent Cycling Stability

Sulfur has been successfully employed into Li2MnSiO4 and results in a high initial discharge capacity and excellent cycling stability.

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