A novel method for preparation of macroposous lithium nickel manganese oxygen as cathode material for lithium ion batteries

Wang, Xiaoya; Hao, Hao; Liu, Jiali; Huang, Tao; Yu, Aishui

doi:10.1016/j.electacta.2010.12.108

Cited by 421 publications

(152 citation statements)

References 23 publications

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“…The semicircle in the high frequency region is attributed to charge transfer resistance. The straight line in the low frequency region represents the diffusion of the sodium ions into the bulk of electrode material [28][29][30]. The corresponding equivalent circuit is attached in Fig.…”

Section: Resultsmentioning

confidence: 99%

Na3V2(PO4)3/C nanorods as advanced cathode material for sodium ion batteries

Bai

et al. 2015

Solid State Ionics

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Section: Resultsmentioning

confidence: 99%

Na3V2(PO4)3/C nanorods as advanced cathode material for sodium ion batteries

Bai

et al. 2015

Solid State Ionics

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“…Electrochemical impedance spectroscopy (EIS) was employed to investigate the electrode kinetics of various Na 3 -V 2Àx Mg x (PO 4 ) 3 /C (x ¼ 0, 0.01, 0.03, 0.05, 0.07 and 0.1) samples. [46][47][48] The inset of Fig. 4a.…”

Section: Resultsmentioning

confidence: 99%

Effects of Mg doping on the remarkably enhanced electrochemical performance of Na₃V₂(PO₄)₃ cathode materials for sodium ion batteries

et al. 2015

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Na 3 V 2Àx Mg x (PO 4 ) 3 /C composites with different Mg 2+ doping contents (x ¼ 0, 0.01, 0.03, 0.05, 0.07 and 0.1) were prepared by a facile sol-gel method. The doping effects on the crystal structure were investigated by XRD, XPS and EXAFS. The results show that low dose doping of Mg 2+ does not alter the structure of the material, and magnesium is successfully substituted for the vanadium site. The Mg doped Na 3 V 2Àx Mg x (PO 4 ) 3 /C composites exhibit significant improvements on the electrochemical performance in terms of the rate capability and cycle performance, especially for the Na 3 V 1.95 Mg 0.05 (PO 4 ) 3 /C. For example, when the current density increased from 1 C to 30 C, the specific capacity only decreased from 112.5 mA h g À1 to 94.2 mA h g À1 showing very good rate capability. Moreover, even cycling at a high rate of 20 C, an excellent capacity retention of 81% is maintained from the initial value of 106.4 mA h g À1 to 86.2 mA h g À1 at the 50th cycle. Enhanced rate capability and cycle performance can be attributed to the optimized particle size, structural stability and enhanced ionic and electronic conductivity induced by Mg doping.batteries for large-scale energy storage system applications is very important. 7 Recently, sodium ion batteries have gained an increasing amount of attention due to their abundant reserves and relatively even geological distribution. 8 Actually, many electrode materials such as Na 4 Fe 3 (PO 4 ) 2 (P 2 O 7 ), 9 Na[Ni 0.25 Fe 0.5 Mn 0.25 ]O 2 / C, 10 Na[Li 0.05 (Ni 0.25 Fe 0.25 Mn 0.5 ) 0.95 ]O 2 , 11 Na x CoO 2 , 12 Na 2 C 8 H 4 O 4 , 13 Na 3 (VO 1Àx PO 4 ) 2 F 1+2x , 14 Prussian blue analogues, 15,16 phosphorus, 17,18 and TiO 2 19 have been studied as active materials in cathodes and anodes for sodium ion batteries. However, due to the bigger ionic radius of the sodium ion than the lithium ion (1.02Å for Na + vs. 0.76Å for Li + ), its storage performance and cycle performance are much poorer than its lithium counterpart. The larger Na + radius is proved to be a crucial obstacle for Na + diffusion. 20,21 Therefore, improving Na + diffusion is quite important in developing new electrode materials for sodium-ion batteries with good electrochemical performance.NASICON-type Na 3 V 2 (PO 4 ) 3 has recently been investigated as a prospective cathode material for sodium ion batteries. It is worth noting that Na 3 V 2 (PO 4 ) 3 possesses the highly covalent three dimensional framework that generates large interstitial spaces through which sodium ions may diffuse easily. [22][23][24][25][26][27] In addition, the electrochemical response of the Na 3 V 2 (PO 4 ) 3 electrode displays two at plateaus at 3.4 V and 1.6 V vs. Na + /Na; the voltage plateau located at 3.4 V is relatively higher than most other cathode materials for sodium ion batteries in recent reports. 28,29 However, Na 3 V 2 (PO 4 ) 3 also has an inherent deciency. The distorted VO 6 octahedral units in the NASICON † Electronic supplementary information (ESI) available: SEM images of Na 3 V 2Àx Mg x (PO 4 ) ...

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“…The suppression of cation mixing of the compound mainly depends on the ionic radii of the dopant element and its level of doping [16]. Very few reports were seen on the preparation of phase pure pristine compound (without doping) with low level or without any cation mixing [14,[18][19][20][21]. Among the above discussed preparation routes, the co-precipitation and ion exchange methods were found to be successful in overcoming cation disorder [10,11].…”

Section: Introductionmentioning

confidence: 96%

Structure and electrical properties of lithium nickel manganese oxide (LiNi0.5Mn0.5O2) prepared by P123 assisted hydrothermal route

et al. 2014

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A novel method for preparation of macroposous lithium nickel manganese oxygen as cathode material for lithium ion batteries

Cited by 421 publications

References 23 publications

Na3V2(PO4)3/C nanorods as advanced cathode material for sodium ion batteries

Na3V2(PO4)3/C nanorods as advanced cathode material for sodium ion batteries

Effects of Mg doping on the remarkably enhanced electrochemical performance of Na₃V₂(PO₄)₃ cathode materials for sodium ion batteries

Structure and electrical properties of lithium nickel manganese oxide (LiNi0.5Mn0.5O2) prepared by P123 assisted hydrothermal route

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A novel method for preparation of macroposous lithium nickel manganese oxygen as cathode material for lithium ion batteries

Cited by 421 publications

References 23 publications

Na3V2(PO4)3/C nanorods as advanced cathode material for sodium ion batteries

Na3V2(PO4)3/C nanorods as advanced cathode material for sodium ion batteries

Effects of Mg doping on the remarkably enhanced electrochemical performance of Na3V2(PO4)3 cathode materials for sodium ion batteries

Structure and electrical properties of lithium nickel manganese oxide (LiNi0.5Mn0.5O2) prepared by P123 assisted hydrothermal route

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Effects of Mg doping on the remarkably enhanced electrochemical performance of Na₃V₂(PO₄)₃ cathode materials for sodium ion batteries