Solvothermal synthesis and electrochemical properties of S-doped Bi2Se3 hierarchical microstructure assembled by stacked nanosheets

RSC Advances ◽  
2016 ◽  
Vol 6 (44) ◽  
pp. 38228-38232 ◽  
Author(s):  
Fangxin Mao ◽  
Jing Guo ◽  
Shaohua Zhang ◽  
Fan Yang ◽  
Qiao Sun ◽  
...  
Keyword(s):  
Energy Storage ◽  
Electrochemical Properties ◽  
Lithium Ion Battery ◽  
Discharge Capacity ◽  
Solvothermal Synthesis ◽  
Lithium Ion ◽  
Initial Discharge Capacity ◽  
Hierarchical Microstructure ◽  
Initial Discharge

Hierarchical S-doped Bi2Se3 microspheres assembled by stacked nanosheets were successfully synthesized as the anode of a lithium ion battery, which shows an initial discharge capacity of 771.3 mA h g−1 with great potential in energy storage.

Synthesis and Electrochemical Properties of Cathode Material LiNi0.8Co0.1Mn0.1O2 via Li, Mg, Al Dopping

2014 ◽  
Vol 1058 ◽  
pp. 302-306 ◽  
Author(s):  
Sha Yuan ◽  
Liang Bin Liu ◽  
Yan Ping Tang ◽  
Jian Hua Wang ◽  
Yu Zhong Guo
Keyword(s):  
Cathode Material ◽  
Electrochemical Properties ◽  
Discharge Capacity ◽  
High Efficiency ◽  
Lithium Ion ◽  
Initial Discharge Capacity ◽  
Capacity Loss ◽  
Initial Discharge ◽  
Result Show ◽  
Properties Of Materials

Coprecipitation method is adopted to prepare LiNi0.8Co0.1Mn0.1O2, to discuss the factors of affecting electrochemical properties and structure at lithium ion battery cathode material LiNi0.8Co0.1Mn0.1O2. In order to improve the electrochemical properties of materials, LiNi0.8Co0.1Mn0.1O2 materials were modified by doping the cation of Li or Mg or Al. Through the charge-discharge tests in the range of 2.5~4.3V, the result show that doped Mg samples with a discharge capacity and high efficiency as well as the lowest capacity loss, the initial discharge capacity is 205.9mA.h/g, after 20 cycles the discharge capacity reached 142.4mA.h/g.

scholarly journals Synthesis and Electrochemical Properties of C/LiMnPO4 Cathode Materials by Complex Polymerized Method

2011 ◽  
Vol 485 ◽  
pp. 115-118
Author(s):  
Atsushi Fujita ◽  
Fuminari Isobe ◽  
Takayuki Kodera ◽  
Takashi Ogihara
Keyword(s):  
Thermogravimetric Analysis ◽  
Electrochemical Properties ◽  
Carbon Content ◽  
Discharge Capacity ◽  
Cathode Materials ◽  
Type Structure ◽  
Initial Discharge Capacity ◽  
Initial Discharge ◽  
Differential Thermogravimetric Analysis

C/LiMnPO4 materials were synthesized by the complex polymerized method. An orthorhombic olivine type structure was obtained by calcination at temperatures over 973 K under an argon/hydrogen (5%) atmosphere. Differential thermogravimetric analysis showed that the carbon content of C/LiMnPO4 was about 65 wt%. The initial discharge capacity of C/LiMnPO4 calcined at 973 K was 135 mAh/g at 0.1 C and 60 mAh/g at 1 C.

Improved electrochemical properties of (1 − x)LiFePO4·xLi3V2(PO4)3/C composites prepared by a novel sol–gel method

2015 ◽  
Vol 39 (11) ◽  
pp. 8971-8977 ◽  
Author(s):  
Yuanchang Si ◽  
Zhi Su ◽  
Yingbo Wang ◽  
Ting Ma ◽  
Juan Ding
Keyword(s):  
Electrochemical Properties ◽  
Discharge Capacity ◽  
Sol Gel ◽  
Initial Discharge Capacity ◽  
Gel Method ◽  
Sol Gel Method ◽  
Initial Discharge

0.8LiFePO4·0.2Li3V2(PO4)3/C composites were synthesized by a new sol–gel method, which delivered an initial discharge capacity of 158.7 mA h g−1 at 0.1C.

LiNi0.5Mn1.5O4 microcubes: cathode materials with improved discharge/charge performances for lithium-ion batteries

CrystEngComm ◽  
2019 ◽  
Vol 21 (3) ◽  
pp. 399-402
Author(s):  
Yanli Fu ◽  
Liqiong Wu ◽  
Shengang Xu ◽  
Shaokui Cao ◽  
Xinheng Li
Keyword(s):  
Lithium Ion Batteries ◽  
Discharge Capacity ◽  
Cathode Materials ◽  
Lithium Ion ◽  
Interfacial Effect ◽  
Initial Discharge Capacity ◽  
Initial Discharge

LiNi0.5Mn1.5O4 microcubes grown from nanowires delivered an initial discharge capacity of 123 mAh g−1 at 1C and maintained 95% of the capacity after 50 cycles due to interfacial effect.

Synthesis and Characterization of Nano Mn3O4 for Lithium-Ion Batteries

2014 ◽  
Vol 687-691 ◽  
pp. 4331-4334
Author(s):  
Han Ping Zhu ◽  
Peng Ding ◽  
Song Fang ◽  
Hailin Liu
Keyword(s):  
Discharge Capacity ◽  
Current Density ◽  
Solvothermal Method ◽  
Lithium Ion ◽  
Constant Current ◽  
Initial Discharge Capacity ◽  
Initial Discharge ◽  
Structure Morphology ◽  
Specific Discharge

nanoMn3O4was prepared by a simple solvothermal method. The structure, morphology and electrochemical properties of the products were investigated by XRD, SEM and constant current discharge-charge test. The results of XRD and SEM shows that nanoMn3O4is high-purity, and it’s diameter is about 30 nm. It could deliver an initial discharge capacity of 1324.4 mAh g-1at the current density of 25.5 mA g-1, and the specific discharge capacity is 586.9 mAh g-1after 30 cycles at the current density of 30.4 mA g-1.

The Electrochemical Property of Cobalt Borate as a Novel Anode Material for Lithium-Ion Battery

2011 ◽  
Vol 236-238 ◽  
pp. 876-879 ◽  
Author(s):  
Xi Xi Shi ◽  
Xing Jiang Liu ◽  
Liang Jie Yuan
Keyword(s):  
Electrochemical Properties ◽  
Lithium Ion Battery ◽  
Anode Material ◽  
Electrochemical Property ◽  
Negative Electrode ◽  
Lithium Ion ◽  
Initial Discharge ◽  
Discharge Curve ◽  
Subsequent Calcination ◽  
Potential Use

Co2B2O5 was synthesized by the rheological phase treatment, followed by ball-milling and subsequent calcination in oxygen atmosphere. The electrochemical properties of this material as a negative electrode for lithium-ion battery were investigated. There are two plateaus with potentials at 0.83 and 0.75 V, respectively, on the first discharge curve. The initial discharge and charge capacities of Co2B2O5 are 1048 and 587 mAh g−1, respectively. The capacity retains 355 mAh g−1 after 10 cycles. The results indicate that Co2B2O5 has potential use in lithium-ion battery as a novel anode material.

Preparation and Electrochemical Properties of LiMnPO4 Nanoparticles by Polyol Method

2013 ◽  
Vol 566 ◽  
pp. 95-98 ◽  
Author(s):  
Takayuki Kodera ◽  
Fuminari Isobe ◽  
Takashi Ogihara
Keyword(s):  
Physical Properties ◽  
Electrochemical Properties ◽  
Discharge Capacity ◽  
Polyol Method ◽  
Initial Discharge Capacity ◽  
Xrd Pattern ◽  
Initial Discharge ◽  
Olivine Structure ◽  
First Discharge Capacity ◽  
Good Agreement

Plate-like LiMnPO4particles were prepared by polyol method. The chemical and physical properties of plate-like LiMnPO4particles were characterized by XRD and SEM. The thickness of plate-like LiMnPO4particles was approximately 35 nm. XRD pattern of plate-like LiMnPO4was good agreement with orthorhombic olivine structure. The first discharge capacity of C/LiMnPO4cathode was approximately 95 mAh/g. 99.9 % of initial discharge capacity was maintained after 100 cycles.

Solvothermal Synthsis of Nano-Sized Li4Ti5O12 Particles as Anode Material for Lithium Ion Batteries

2015 ◽  
Vol 1120-1121 ◽  
pp. 281-285 ◽  
Author(s):  
Yue Zhang ◽  
Yu Jing Zhu ◽  
Yuan Xiang Gu ◽  
Rui Xin Chen
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Discharge Capacity ◽  
Solvothermal Method ◽  
Rate Capability ◽  
Lithium Ion ◽  
Electrochemical Measurements ◽  
Initial Discharge Capacity ◽  
Initial Discharge

We synthesized nano-Li4Ti5O12 particles by solvothermal method. The as-prepared materials were characterized by XRD, SEM, TEM and electrochemical measurements. The Li4Ti5O12Li4Ti5O12 showed excellent rate capability and cycle ability. The as-preparedLi4Ti5O12 Li4Ti5O12 electrode exhibited highly initial discharge capacity 176 mAh/g at 0.1 C rate up to, which was slightly higher than its theoretical capacity (175 mAh/g). By increasing the C-rate, the cell showed 152, 143, 138 and 135 mAh/g at 0.5, 1, 1.5 and 2 C, respectively.

Developing new techniques to synthesize layered cathode materials for lithium-ion batteries

2019 ◽  
Author(s):  
◽  
Khaleel Idan Hamad
Keyword(s):  
Discharge Capacity ◽  
Cathode Materials ◽  
Sol Gel ◽  
Lithium Ion ◽  
Capacity Fade ◽  
Nitrate Salt ◽  
Initial Discharge Capacity ◽  
Capacity Retention ◽  
Initial Discharge ◽  
Co Precipitation

Many synthesis techniques like sol-gel, co-precipitation, hydrothermal, pyrolysis, and many more have been used to synthesize batteries' active electrode materials. High surface area cathode materials with smaller nanoparticles are favored for their higher reactivity compared to materials with particles of larger size. Sol-gel and co-precipitation methods have been primarily adopted because they can produce the desirable particle size easily and on a large scale. This dissertation details an efficient and cost-effective process for using a newly developed sol-gel method that uses glycerol solvent instead of the conventionally used water. Glycerol has three hydroxyl groups (OH) instead of one in water. These can play an important role in nanoparticle formation at earlier stages by speeding up the reaction. One of the main reasons for capacity fade in batteries is cationic mixing between Ni2+ and Li+. This results in blocking of the Li+ path and ultimately poor cyclability. This capacity fade has been successfully minimized in our current work by taking advantage of the high heat released from glycerol to get partially crystalline nanoparticles that could mitigate cationic mixing at high temperatures. The first cathode material synthesized using glycerol solvent was LiMn1/3Ni1/3Co1/3O2 (LMNC) layered oxide cathode material. Temperature's effects on the particles' morphologies, sizes, and electrochemical performances have been studied at four different temperatures. LMN2 was annealed at 900 �C/8hr and shows desirable particles size of ~ 0.3 (�_m), an initial discharge capacity of 177.1 mAh/g in the first cycle, and a superior capacity retention of 83.7% after 100 cycles. The process takes eight hours, rather than >12hr when using other solvents to prepare LMNC material at high temperatures. The results also demonstrate the higher stability and lower cationic mixing after 100 cycles. To increase capacity and voltage, lithium-rich cathode materials with the formula Li1.2Mn0.51Ni0.145+xCo0.145-xO2 (x = 0 (LR2), 0.0725 (LR1)) have been successfully synthesized. In this material, cobalt (Co) content has been decreased by half and the larger produced particles have suppressed the total activation of Li2MnO3 phase in the first charge cycle. The specific discharge capacity retention of LR1 at 1C between 2 and 4.8 V was more than 100% after 100 cycles. Further improvements to LR1 cathode materials have led to an increase in the initial discharge capacity to 248 mAh/g at 0.1C. This is achieved by using an equimolecular combination of acetate and nitrate salt anions (LRACNI) with cornstarch. Cornstarch acts as a capping agent with the nitrate salt anions, and a gelling agent with acetate based anions. LRACNI shows an intermediate particle size with satisfactory capacity retention upon cycling and the lowest cationic mixing. LiNi0.8Co0.15Al0.05O2 (NCA) is one of the most commercialized cathode materials for lithium-ion batteries. It is challenging to have a high Ni content with Li in one combination electrode because cationic mixing increases proportionally. The use of glycerol has diminished the cationic mixing. High capacity retentions of 97% at 1C after 50 cycles, 87.6% at 0.3C after 100 cycles, and 93.6% at 0.1C after 70 cycles have been successfully achieved, which are better than those previously reported.

Mg doped Li2FeSiO4/C nanocomposites synthesized by the solvothermal method for lithium ion batteries

2017 ◽  
Vol 46 (38) ◽  
pp. 12908-12915 ◽  
Author(s):  
Ajay Kumar ◽  
O. D. Jayakumar ◽  
Jagannath Jagannath ◽  
Parisa Bashiri ◽  
G. A. Nazri ◽  
...  
Keyword(s):  
Carbon Content ◽  
Lithium Ion Batteries ◽  
Discharge Capacity ◽  
Solvothermal Method ◽  
Rate Capability ◽  
Lithium Ion ◽  
Initial Discharge Capacity ◽  
Cycle Stability ◽  
Initial Discharge ◽  
Mg Doped

Despite having the same carbon content, Li2Fe0.99Mg0.01SiO4/C delivered the highest initial discharge capacity and also exhibited the best rate capability and cycle stability.

Sign in / Sign up

Export Citation Format

Share Document