Study of a High-Power Lithium-Ion Battery for Parallel HEV Application

Tanjo, Yuji; Abe, Takaaki; Horie, Hitoshi; Nakagawa, Toyoaki; Miyamoto, Takeshi; Katayama, Kiyoshi

doi:10.4271/1999-01-1155

Cited by 10 publications

(6 citation statements)

References 1 publication

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“…A similar specific power was recently obtained in a high-power lithium-ion prototype cell based on LiCoO 2 as a positive electrode active material. 8,9 The specific power of such a battery is in the same range as the specific power of an electrochemical double-layer capacitor. However, the specific energy of the battery is significantly higher than that of the capacitor (which is of the order of a few watt-hours per kilogram).…”

Section: Specific Energy and Power Of A Thin-film Lithium Battery Bas...mentioning

confidence: 99%

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Large-Agglomerate-Size Lithium Manganese Oxide Spinel with High Rate Capability for Lithium-Ion Batteries

Lanz

Kormann

Steininger

et al. 2000

J. Electrochem. Soc.

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Lithium manganese oxide spinel (LiMn 2 O 4 ) is gaining prominence as a positive electrode material for lithium-ion batteries. After an extensive research effort (see, for example, Ref. 1-3), LiMn 2 O 4 spinel with good cycling stability is now available. LiMn 2 O 4 is an attractive alternative to Co and Ni oxides currently used in lithiumion batteries. [4][5][6] For certain applications, such as in electric vehicles, lithium-ion batteries are required to have a high specific power in addition to a high specific energy. 7-10 Thus, electrode materials with high rate capability are of interest.The main strategies adopted so far to reach a high rate capability of the spinel electrode have been the preparation of spinel particles with small sizes, and an optimization of the electrode conductivity. 11-16 However, for industrial battery electrode coating processes, relatively large particles with a small Brunauer-Emmett-Teller (BET) surface area are advantageous. In the present report, we show that it is not necessary to use micrometer-or submicrometer-sized oxide particles when aiming at high rate capabilities. We adapted a high-temperature synthesis route for preparing a spinel consisting of agglomerates with an average size of 15 m. The agglomerates were composed of primary particles (ca. 0.5-3 m). We measured the discharge capability of electrodes containing this spinel up to a discharge rate of 20 C (3 min for full discharge) in an electrochemical test cell with a metallic lithium counter electrode and found a high rate capability for this spinel. ExperimentalSpinel synthesis.-The lithium manganese oxide spinel was synthesized using a proprietary ceramic process. A mixture of manganese oxide (Mn 3 O 4 ) with a specific surface area of about 10 Ϯ 5 m 2 /g and ground lithium carbonate with a particle size of less than about 40 m was heated for 1 h under N 2 to about 750ЊC. The resulting product, which did not yet have a spinel structure, was thoroughly ground. This spinel precursor material was suspended with about 1 wt % of polyvinyl alcohol in water and spray-dried to form a granular powder. This powder was oxidized in O 2 at a temperature of about 780ЊC to form the spinel. The spinel was finally coated with Li 2 CO 3 by spray-drying an aqueous slurry of the spinel and 1 wt % of the coating substance in a stream of hot air (200-300ЊC).Physical characterization.-The lattice constant of the spinel was determined at room temperature by powder X-ray diffraction (XRD) in a Siemens D5000 diffractometer. It was found to be 8.224 Å. The lithium content of the spinel was calculated to be Li 1.09 Mn 1.91 O 4 (by linear interpolation of the lattice constants, 8.248 Å for Li 1.00 Mn 2.00 O 4 and 8.16 Å for Li 1.333 Mn 1.667 O 4 ). 17The particle size distribution of the spinel was determined in an aqueous slurry of the spinel powder by laser scattering using a Helos instrument. The result is shown in Fig. 1. The average particle (agglomerate) size is 15 m.Scanning electron micrographs (SEMs) of the spinel were recorded with a...

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Section: Specific Energy and Power Of A Thin-film Lithium Battery Bas...mentioning

confidence: 99%

“…[4][5][6] For certain applications, such as in electric vehicles, lithium-ion batteries are required to have a high specific power in addition to a high specific energy. [7][8][9][10] Thus, electrode materials with high rate capability are of interest.…”

mentioning

confidence: 99%

Large-Agglomerate-Size Lithium Manganese Oxide Spinel with High Rate Capability for Lithium-Ion Batteries

Lanz

Kormann

Steininger

et al. 2000

J. Electrochem. Soc.

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“…High power applications such as electric vehicles require that lithium-ion batteries have a high specific power and energy [4,5]. One route to increase specific power is to significantly increase the interfacial area between electrochemically active material and electrolyte, thereby increasing the charge and discharge rates [6].…”

Section: Introductionmentioning

confidence: 99%

Flame co-synthesis of LiMn2O4 and carbon nanocomposites for high power batteries

Patey

Büchel

et al. 2009

Journal of Power Sources

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“…Recently, hard-carbon has been reconsidered as a prominent anode active material of LIB with increasing an expectation of application to large size instruments. Its properties of high power and long durability are expected to be superior as the power source of large size batteries [2], for example, the battery used to Pure Electric Vehicle (PEV) or Hybrid Electric Vehicle (HEV).…”

Section: Introductionmentioning

confidence: 99%

Properties of a novel hard-carbon optimized to large size Li ion secondary battery studied by 7Li NMR

Gotoh

Maeda

Nagai

et al. 2006

Journal of Power Sources

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The state of lithium in a novel hard-carbon optimized to the anode of large size Li ion secondary battery, which has been recently commercialized, was investigated and compared with other existing hard-carbon samples by 7 Li NMR method. The new carbon material showed a peak at 85 ppm with a shoulder signal at 7 ppm at room temperature in static NMR spectrum, and the former shifted to 210 ppm at 180 K. The latter at room temperature was attributed to Li doped in small particles contained in the sample. The new carbon sample showed weaker intensity of cluster-lithium signal than the other hard-carbon samples in NMR, which corresponded to a tendency of less "Constant Voltage" (CV) capacity in charge-discharge curves of electrochemical evaluation. Smaller CV capacity and initial irreversible 2 capacity, which are the features of the novel hard-carbon, are considered to correspond to a blockade of the diffusion of Li into pore of carbon.

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Study of a High-Power Lithium-Ion Battery for Parallel HEV Application

Cited by 10 publications

References 1 publication

Large-Agglomerate-Size Lithium Manganese Oxide Spinel with High Rate Capability for Lithium-Ion Batteries

Large-Agglomerate-Size Lithium Manganese Oxide Spinel with High Rate Capability for Lithium-Ion Batteries

Flame co-synthesis of LiMn2O4 and carbon nanocomposites for high power batteries

Properties of a novel hard-carbon optimized to large size Li ion secondary battery studied by 7Li NMR

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