Ionic conductivity and ambient temperature Li electrode reaction in composite polymer electrolytes containing nanosize alumina

Nookala, Munichandraiah; Kumar, Binod; Rodrigues, Stanley

doi:10.1016/s0378-7753(02)00303-8

Cited by 94 publications

(41 citation statements)

References 17 publications

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“…In this case, the composition of the SPE of PEO;LiClO 4 :PAA/PMAA/Li 0.3 was 8:1:0.1 wt%. As shown in the figure, the anodic and cathodic peaks were not observed below 50°C, however, a pair of redox peak was clearly observed at 70°C, showing the anodic peaks at ?380 mV and the cathodic peak at 740 mV, which is comparable to the previous result [24]. This indicates that both the anodic and cathodic processes were promoted by the easy movement of the Li ions at temperatures above 70°C, because the melting point of PEO is 64°C and it changes into the amorphous state at this temperature, thus facilitating the movement of the Li ions.…”

Section: Equipments and Cell Constructionsupporting

confidence: 88%

Effect of additives in PEO/PAA/PMAA composite solid polymer electrolytes on the ionic conductivity and Li ion battery performance

Jeong

Won

et al. 2009

J Appl Electrochem

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Polyethylene oxide (PEO) based-solid polymer electrolytes were prepared with low weight polymers bearing carboxylic acid groups added onto the polymer backbone, and the variation of the conductivity and performance of the resulting Li ion battery system was examined. The composite solid polymer electrolytes (CSPEs) were composed of PEO, LiClO 4, PAA (polyacrylic acid), PMAA (polymethacrylic acid), and Al 2 O 3 . The addition of additives to the PEO matrix enhanced the ionic conductivities of the electrolyte. The composite electrolyte composed of PEO:LiClO 4 :PAA/PMAA/Li 0.3 exhibited a low polarization resistance of 881.5 ohms in its impedance spectra, while the PEO:LiClO 4 film showed a high value of 4,592 ohms. The highest ionic conductivity of 9.87 9 10 -4 S cm -1 was attained for the electrolyte composed of PEO:LiClO 4 :PAA/ PMAA/Li 0.3 at 20°C. The cyclic voltammogram of Li ? recorded for the cell consisting of the PEO:LiClO 4 :PAA/ PMAA/Li 0.3 :Al 2 O 3 composite electrolyte exhibited the same diffusion process as that obtained with an ultramicroelectrode. Based on this electrolyte, the applicability of the solid polymer electrolytes to lithium batteries was examined for an Li/SPE/LiNi 0.5 Co 0.5 O 2 cell.

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Section: Equipments and Cell Constructionsupporting

confidence: 88%

Effect of additives in PEO/PAA/PMAA composite solid polymer electrolytes on the ionic conductivity and Li ion battery performance

Jeong

Won

et al. 2009

J Appl Electrochem

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“…The interfacial resistance, R i , is considered to comprise not only the resistances deriving from the interfacial layers but also the charge-transfer resistance ͑R c ͒ of the Li + + e − = Li reaction. [24][25][26] The NLLSF program was utilized to analyze the impedance spectra at 60°C in terms of the equivalent circuit shown in Fig. 1.…”

Section: Resultsmentioning

confidence: 99%

Water-Stable Lithium Anode with the Three-Layer Construction for Aqueous Lithium–Air Secondary Batteries

Zhang

Imanishi

Hasegawa

et al. 2009

Electrochem. Solid-State Lett.

113

104

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A water-stable multilayer Li-metal electrode consisting of a lithium metal, a PEO 18 LiN͑SO 2 CF 3 ͒ 2 -BaTiO 3 composite polymer, and a lithium-conducting glass ceramic Li 1.35 Ti 1.75 Al 0.25 P 0.9 Si 0.1 O 12 ͑LTAP͒ was proposed as the lithium anode for aqueous lithium-air secondary batteries. The addition of finely dispersed nanosize BaTiO 3 in the polymer electrolyte greatly reduced the interfacial resistance between the Li anode and the polymer electrolyte. A Li/PEO 18 LiN͑SO 2 CF 3 ͒ 2 -10 wt % BaTiO 3 /LTAP electrode showed a total resistance of 175 ⍀ cm 2 in a 1 M aqueous LiCl solution at 60°C, with no change in the electrode resistance over a month. The Li/PEO 18 LiN͑SO 2 CF 3 ͒ 2 -10 wt % BaTiO 3 /LTAP/aqueous 1 M LiCl/Pt air cell had a stable opencircuit voltage of 3.80 V, which was equivalent to that calculated from the cell reaction of 2Li + 1/2O 2 + H 2 O = 2LiOH. The cell exhibited a stable and reversible discharge/charge performance of 0.5 mA cm −2 at 60°C, suggesting excellent reversibility of the lithium oxidation reduction reaction for the Li/PEO 18 LiN͑SO 2 CF 3 ͒ 2 -10 wt % BaTiO 3 /LTAP electrode. Metal-air batteries usually consist of a metal anode electrochemically coupled to oxygen, which is obtained from the environment through an air cathode. This type of battery is unique because oxygen is not stored in the cathode and is essentially an unlimited reactant source. Thus the capacity of the battery is theoretically limited only by the metal anode.1 Of all the metal-air batteries, the lithium-air battery has the highest theoretical specific energy of 11,140 Wh kg −1 with a calculated open-circuit voltage ͑OCV͒ of 2.91 V, based on the cell reaction 4Li + O 2 = 2Li 2 O, in a nonaqueous electrolyte.2,3 This specific energy is eight times higher than that of Zn-air and is comparable with that of a gasoline-air system. It is, therefore, expected that lithium-air batteries will have a potential as a power source, with high energy density, for use in advanced electric vehicles.4 A rechargeable lithium-air battery, using a polyacrylonitrile-based plasticized polymer electrolyte, was reported in 1996 by Abraham and Jiang.2 This cell showed a discharge capacity of 1600 mAh g −1 , and the specific energy density, including the weight of the electrode and the electrolyte, was estimated to be 250-350 Wh kg −1 . Read et al. 5,6 also observed a high discharge capacity of 2120 mAh g −1 during their detailed study of the electrolyte and air cathode formulation of a lithium/oxygen organic electrolyte cell. Ogasawara et al. 7 presented more attractive results in a rechargeable lithium-oxygen cell, with an organic electrolyte and a MnO 2 catalyst for Li 2 O 2 reduction. A high charge and discharge capacity of 600 mAh g −1 was achieved after 50 cycles, compared with a reversible capacity of 150 mAh g −1 for the cathode materials in conventional lithium-ion batteries. Recently, the authors showed improved discharge capacity, with better cyclability, using nanowire ␣-MnO 2 catalysts.8 This high cathode capacit...

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“…1) [18][19][20]. Segments include: (a) electric connection resistance and the electrolyte bulk resistance corresponding to the resistance at the highest frequencies, followed by (b) an R-C parallel circuit describing the SEI layer in the middle frequency region, and finally (c) an R-C parallel circuit for double layer capacitance and charge transfer reaction, including a Warburg diffusion term in the low-frequency region corresponding to lithium diffusion in the solid state [30,33,34,49,53].…”

Section: Implementation Of Equivalent Circuit Modelmentioning

confidence: 99%

“…For example, EIS has been used to analyze the electrochemical lithium intercalation reaction into carbonaceous material in the carbonate electrolyte system and the subsequent formation of a SEI film [30][31][32][33][34][35][36]. EIS has also been performed on graphite/lithium cells with polysiloxane-based electrolyte containing LiBOB.…”

Section: Introductionmentioning

confidence: 99%

Passive film formation on a graphite electrode: Effect of siloxane structures

Nakahara¹,

Yoon²,

Nutt³

2006

Journal of Power Sources

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Ionic conductivity and ambient temperature Li electrode reaction in composite polymer electrolytes containing nanosize alumina

Cited by 94 publications

References 17 publications

Effect of additives in PEO/PAA/PMAA composite solid polymer electrolytes on the ionic conductivity and Li ion battery performance

Effect of additives in PEO/PAA/PMAA composite solid polymer electrolytes on the ionic conductivity and Li ion battery performance

Water-Stable Lithium Anode with the Three-Layer Construction for Aqueous Lithium–Air Secondary Batteries

Passive film formation on a graphite electrode: Effect of siloxane structures

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