Effect of increased surface area of LiMn0.475Ni0.475Al0.05O2 cathode material for Li-ion battery

Woo, Sung Pil; Lee, Seok Hee; Lee, Kang Soo; Yoon, Young Soo

doi:10.1016/j.matlet.2014.05.030

Cited by 9 publications

(6 citation statements)

References 16 publications

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“…Aqueous rechargeable lithium batteries (ARLBs) have received great attention recently, due to the less toxicity, lower cost and higher safety thanks to water solvent [1]. Both cathode and anode of ARLBs are lithium intercalation compounds.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and electrochemical properties of LiFePO4/graphene composite as a novel cathode material for rechargeable hybrid aqueous battery

2015

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Section: Introductionmentioning

confidence: 99%

Synthesis and electrochemical properties of LiFePO4/graphene composite as a novel cathode material for rechargeable hybrid aqueous battery

2015

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“…[21][22][23] Generally, the higher the specific area of the powder, the higher the electrode ECSA and specific power are. This effect is mostly due to a shorter ion diffusion path inside grains [24,25] or a high double layer charge. [26] Unfortunately, the BET analysis has limited capabilities in evaluation of the electrode active surface area.…”

Section: Introductionmentioning

confidence: 99%

A New Technique for In Situ Determination of the Active Surface Area Changes of Li–Ion Battery Electrodes

Ratyński

Hamankiewicz

Buchberger

et al. 2020

Batteries & Supercaps

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Li‐ion batteries have been of a great interest for over three decades. A geometric electrode surface area is generally used for Li‐ion electrochemical parameters calculations. Since the real electrode is a complex system composed of the thick porous structure, the contact surface area between the active mass and electrolyte is far larger than geometrical. This approximation leads to a large deviation of obtained results, especially within different laboratories and for volume and surface changing materials, e. g., silicon. The article presents a new method of in situ analysis of active surface area variations applicable for Li‐ion electrodes. The method relies on the electrochemical impedance spectroscopy measurement (EIS) performed at an arbitrarily chosen state of charge during superimposed DC current flow. The correlation between a local ion concentration with a charge transfer resistance allows to evaluate the differences of the active surface area. The presented method is not affected by the SEI layer presence, the material composition, nor the lithiation mechanism. Due to limited EIS frequency range the presented method can be performed with a relatively short time. Our new in situ surface area determination can greatly improve the accuracy of the electrochemical parameters evaluation and enable the proper result analysis. We believe that our method can become a standard procedure implemented in every research focusing on the electrochemical parameter determination of the volume changing active materials.

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“…Relative to the reduction in particle size and carbon coating strategies, the approach of increasing surface area to improve electrical performance is less studied. Woo et al in 2014 concluded that an increase in the surface area of the LiMPO 4 material, after a reduction in the primary particle size and carbon coating were achieved, would allow a high initial discharge capacity and good cycling performance due to an increase in the Li + -ion contact surface area . An increase in the surface area should also allow better electrolyte–cathode interaction, which is known to improve the electrical conduction. , …”

Section: Introductionmentioning

confidence: 99%

“…The primary focus of this work is to explore the feasibility of using a single-source precursor gel to produce LiMPO 4 with features such as high crystallinity, surface carbon coating, 40–50 nm in size, and high surface area, as recommended by literature reports. ,, …”

Section: Introductionmentioning

confidence: 99%

“…Woo et al in 2014 concluded that an increase in the surface area of the LiMPO 4 material, after a reduction in the primary particle size and carbon coating were achieved, would allow a high initial discharge capacity and good cycling performance due to an increase in the Li + -ion contact surface area. 25 An increase in the surface area should also allow better electrolyte−cathode interaction, which is known to improve the electrical conduction. 26,27 In relation to the calcination of organic acid, the calcination of alginate is known to produce porous and hierarchical carbon depending on the actual synthesis and catalyst used.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Characterization of Alginate-Based Sol–Gel Synthesis of Lithium Nickel Phosphate with Surface Area Control

Thong

Beh

Lai

et al. 2018

Ind. Eng. Chem. Res.

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A sol−gel method in which alginate was used to help prepare carbon-coated LiNiPO 4 nanocrystal aggregates with controllable surface area is reported. Nickel alginate prepared from NiCl 2 and sodium alginate was blended with stoichiometric LiOH and H 3 PO 4 to produce a single-source precursor gel. Calcining the gel in air at 400−800 °C produced LiNiPO 4 nanocrystal aggregates with different levels of crystallinity, sizes, and surface areas. Powder X-ray diffraction, fieldemission scanning electron microscopy, high-resolution transmission electron microscopy, and Brunauer−Emmett−Teller analyses collectively showed that 600 °C was the optimal calcination temperature that gave LiNiPO 4 with an average crystallite size of 43 nm, a surface carbon coating of 2−4 nm, and a surface area of 27.47 m 2 /g. The method allows simultaneous achievement of four features, namely, surface carbon coating, high crystallinity, control of primary particle size, and high surface area. Simple modification of the method would allow the production of a wider range of LiMPO 4 (M = Fe, Co, Mn).

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Effect of increased surface area of LiMn0.475Ni0.475Al0.05O2 cathode material for Li-ion battery

Cited by 9 publications

References 16 publications

Synthesis and electrochemical properties of LiFePO4/graphene composite as a novel cathode material for rechargeable hybrid aqueous battery

Synthesis and electrochemical properties of LiFePO4/graphene composite as a novel cathode material for rechargeable hybrid aqueous battery

A New Technique for In Situ Determination of the Active Surface Area Changes of Li–Ion Battery Electrodes

Synthesis and Characterization of Alginate-Based Sol–Gel Synthesis of Lithium Nickel Phosphate with Surface Area Control

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