scholarly journals Improved Electrochemical Properties of LiMn2O4-Based Cathode Material Co-Modified by Mg-Doping and Octahedral Morphology

Materials ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 2807 ◽  
Author(s):  
Hongyuan Zhao ◽  
Yongfang Nie ◽  
Dongyang Que ◽  
Youzuo Hu ◽  
Yongfeng Li
Keyword(s):  
High Temperature ◽  
Cathode Material ◽  
Electrochemical Properties ◽  
Solid Phase ◽  
High Capacity ◽  
Temperature Cycling ◽  
Phase Method ◽  
Mg Doping ◽  
Jahn Teller ◽  
Solid Phase Method

In this work, the spinel LiMn2O4 cathode material was prepared by high-temperature solid-phase method and further optimized by co-modification strategy based on the Mg-doping and octahedral morphology. The octahedral LiMn1.95Mg0.05O4 sample belongs to the spinel cubic structure with the space group of Fd3m, and no other impurities are presented in the XRD patterns. The octahedral LiMn1.95Mg0.05O4 particles show narrow size distribution with regular morphology. When used as cathode material, the obtained LiMn1.95Mg0.05O4 octahedra shows excellent electrochemical properties. This material can exhibit high capacity retention of 96.8% with 100th discharge capacity of 111.6 mAh g−1 at 1.0 C. Moreover, the rate performance and high-temperature cycling stability of LiMn2O4 are effectively improved by the co-modification strategy based on Mg-doping and octahedral morphology. These results are mostly given to the fact that the addition of magnesium ions can suppress the Jahn–Teller effect and the octahedral morphology contributes to the Mn dissolution, which can improve the structural stability of LiMn2O4.

Synthesis and Electrochemical Performance of LiFe1-xMnxPO4/C Cathode Material

2011 ◽  
Vol 347-353 ◽  
pp. 3434-3438
Author(s):  
Yan Jun Wei ◽  
Guang Chuan Liang ◽  
Li Wang ◽  
Xiu Qin Ou
Keyword(s):  
High Temperature ◽  
Electrochemical Performance ◽  
Cathode Material ◽  
Electrochemical Properties ◽  
Specific Energy ◽  
Solid Phase ◽  
Constant Current ◽  
Phase Method ◽  
Solid Phase Method ◽  
Constant Current Charging

Olivine LiFe1−xMnxPO4/C composites were prepared by high temperature solid phase method using MnO2, NH4H2PO4, Li2CO3, FeC2O4•2H2O, glucose as the starting materials. XRD, SEM and constant-current charging/discharging tests were used to study the structure and electrochemical properties of the material. The result showed that when x=0.2 the material exhibited the optimal electrochemical performance, with a higher specific energy of 484.94 Wh/kg.

Effects of Morphological Collapse of Sphere Secondary Particles on Electrochemical Properties of a LiNi0.83Co0.11Mn0.06O2 Cathode Material for Lithium-Ion Batteries

2020 ◽  
Vol 12 (9) ◽  
pp. 1278-1282
Author(s):  
Jun-Seok Park ◽  
Un-Gi Han ◽  
Gyu-Bong Cho ◽  
Hyo-Jun Ahn ◽  
Ki-Won Kim ◽  
...  
Keyword(s):  
Cathode Material ◽  
Electrochemical Properties ◽  
Lithium Ion Batteries ◽  
Solid Phase ◽  
Lithium Ion ◽  
Cycle Performance ◽  
Phase Method ◽  
Electrochemical Characteristics ◽  
Secondary Particles ◽  
Tap Density

Li[NixCoyMnz]O2 (LiNCM) is one of the candidate cathode material that can replace the currently commercialized LiCoO2 (LCO) cathode material for lithium-ion batteries (LiBs). The morphological feature having primary particle and secondary sphere particle could affect structural stability, tap density and electrochemical performance of LiNCM. In this work, two LiNCM particles without or with the morphological collapse of the secondary particles were prepared by using a co-precipitation-assisted, solid-phase method and ball milling, and its morphological, structural and electrochemical characteristics were evaluated. The results of XRD, and FESEM demonstrated that the as-prepared two LiNCMs have a typical α-NaFeO2 layered structure and the two morphological features of secondary particles needed in this study. The results of electrochemical properties indicated that the LiNCM electrode without collapsed secondary particles have a good stability in cycle performance compared to that with collapse of secondary particles at 0.5, 1.0 and 2 C-rate. The capacity retention of without and with collapsed NCM was 55.8% and 27.3% after 200 cycles at 1 C-rate, respectively.

Research on Electrochemical Properties of LiMnPO4 Synthesized by High Temperature Solid-Phase Method

2012 ◽  
Vol 487 ◽  
pp. 714-718 ◽  
Author(s):  
Sheng Kui Zhong ◽  
Ying Mei Zhang ◽  
Wei Li ◽  
Yue Bin Xu
Keyword(s):  
High Temperature ◽  
Solid Phase ◽  
Raw Materials ◽  
Particle Surface ◽  
Lithium Ion ◽  
Xrd Analysis ◽  
Spherical Particles ◽  
Phase Method ◽  
Solid Phase Method ◽  
Olivine Structure

LiMnPO4cathode material for lithium ion batteries was synthesized by high temperature solid-phase method using MnCO3, Li2CO3, NH4H2PO4as raw materials. The structure of samples was identified by XRD analysis and the particle surface morphology was examined by SEM. The results of XRD showed that the LiMnPO4sample sintered at 700°C for 20h had single ordered olivine structure. The SEM pattern showed that spherical particles distributed uniformly. Respectively, it figured out that the initial charge and discharge capacities of the samples at 0.05C rate were 133.9 and 66.4mAh•g-1.

Na3V2(PO4)3/C synthesized by a facile solid-phase method assisted with agarose as a high-performance cathode for sodium-ion batteries

2017 ◽  
Vol 5 (21) ◽  
pp. 10261-10268 ◽  
Author(s):  
Pingyuan Feng ◽  
Wei Wang ◽  
Kangli Wang ◽  
Shijie Cheng ◽  
Kai Jiang
Keyword(s):  
Cathode Material ◽  
High Performance ◽  
Solid Phase ◽  
Sodium Ion ◽  
Phase Method ◽  
Sodium Ion Batteries ◽  
Solid Phase Method

Na3V2(PO4)3/C, as a high-performance cathode material for sodium ion batteries, was synthesized via a facile agarose-assisted solid-phase method.

Synthesis of Spherical Fluorine Modified Gradient Li-Ion Battery Cathode Material LiNi0.80Co0.15Al0.05O2by Simple Solid Phase Method

2018 ◽  
Vol 165 (5) ◽  
pp. A1019-A1026 ◽  
Author(s):  
Shubiao Xia ◽  
Fushao Li ◽  
Feixiang Cheng ◽  
Xue Li ◽  
Chengke Sun ◽  
...  
Keyword(s):  
Cathode Material ◽  
Solid Phase ◽  
Phase Method ◽  
Li Ion Battery ◽  
Solid Phase Method ◽  
Li Ion

The decay model of Eu2+ and Eu2+, Dy3+ substituted SrAl2O4 prepared by high temperature solid phase method

2019 ◽  
Vol 124 ◽  
pp. 151-156 ◽  
Author(s):  
Lei Yang ◽  
Qianwen Liu ◽  
Hongying Zheng ◽  
Siyuan Zhou ◽  
Wei Zhang
Keyword(s):  
High Temperature ◽  
Solid Phase ◽  
Phase Method ◽  
Decay Model ◽  
Solid Phase Method

Luminescence properties and energy transfer of La3Ga5SiO14:Eu3+, Tb3+ phosphors

CrystEngComm ◽  
2021 ◽  
Author(s):  
Xianggang Zuo ◽  
Yi Wang ◽  
Lei Wei ◽  
Xianshun Lv ◽  
Yangbin Fu ◽  
...  
Keyword(s):  
Energy Transfer ◽  
High Temperature ◽  
Solid Phase ◽  
Luminescence Properties ◽  
Phase Method ◽  
Excellent Performance ◽  
Solid Phase Method

In this paper, a series of Eu3+/Tb3+ doped La3Ga5SiO14 (LGS: Eu3+, Tb3+) phosphors with excellent performance have been synthesized by high-temperature solid-phase method. The effects of Eu3+ and Tb3+ doping...

Effects of Cr Doping on the Structural and Electrochemical Properties of V6O13

2010 ◽  
Vol 34-35 ◽  
pp. 1780-1783 ◽  
Author(s):  
Yuan Chun Liu ◽  
Zheng Guang Zou ◽  
Fei Long
Keyword(s):  
Electrochemical Properties ◽  
Cathode Materials ◽  
Solid Phase ◽  
Lithium Ion ◽  
Chain Structure ◽  
Raw Material ◽  
Phase Method ◽  
Discharge Process ◽  
Solid Phase Method ◽  
Cr Doping

It has been demonstrated that V6O13 is a very attractive cathode materials for rechargeable lithium-ion batteries. Cr3+ was doped to improve its electrochemical property. CrxV6O13(x =0.01~0.05) cathode materials were prepared using NH4VO3 and Cr2O3 as raw material by solid phase method in argon atmosphere. The best electrochemical properties of CrxV6O13 were obtained under the optimum conditions as follows: the argon flow rate is 85mL/min, the heating rate is 5°C /min, the holding time 1h at 180°C, 1h at 300°C and 30 min at 450°C. The structural and electrochemical properties were examined by means of X-ray diffraction, SEM and charge–discharge tests. The results demonstrated that the powders maintain double cavity chain structure regardless of the chromium doping. When the Cr doping of x = 0.03, capacity is highest. Maximum initial discharge capacity is 334mA•h/g, 80% of theoretical capacity. During discharge process there is 6.5 Li+ embedded in the Molecules of doping. After discharge cathode became Li6.5Cr0.03V6O13.

Structural analysis and optical temperature sensing performance of Eu3+-doped Ba3In(PO4)3

CrystEngComm ◽  
2020 ◽  
Vol 22 (35) ◽  
pp. 5809-5817
Author(s):  
Guangqing Zhang ◽  
Maxim S. Molokeev ◽  
Qianchao Ma ◽  
Xuening Yang ◽  
Shuiquan Han ◽  
...  
Keyword(s):  
High Temperature ◽  
Structural Analysis ◽  
Solid Phase ◽  
Temperature Sensing ◽  
Phase Method ◽  
Solid Phase Method ◽  
Sensing Performance

Eu3+-Doped Ba3In(PO4)3 was synthesized through a high-temperature solid-phase method.

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