巻号一覧
60 巻, 1 号
January
選択された号の論文の10件中1～10を表示しています
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特集：次世代へ向けた電池材料への新展開
総報
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菅野 了次2013 年 60 巻 1 号 p. 2
発行日: 2013/01/15
公開日: 2013/03/01
ジャーナル オープンアクセスPDF形式でダウンロード (135K)
研究論文
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田渕 光春, 鍋島 洋子, 竹内 友成, 蔭山 博之, 辰己 国昭, 谷本 一美, 秋本 順二, 渋谷 英香, 今泉 純一2013 年 60 巻 1 号 p. 3-8
発行日: 2013/01/15
公開日: 2013/03/01
ジャーナル オープンアクセスFe- or Fe and Ti-substituted Li2MnO3 positive electrode material (FM or FMT sample) with monoclinic Li2MnO3 type structure (C2/m) was synthesized using coprecipitation-hydrothermal-calcination. Both materials exhibited high specific capacity greater than 200 mAh/g against a Li metal negative electrode at moderate current density of 40 mA/g between 2.0 and 4.8 V using stepwise charging. The cycle performance for the FMT sample (Li1+x(Fe0.2Ti0.2Mn0.6)1−xO2, 0 < x< 1/3) using a graphite negative electrode was better than that for the FM sample (Li1+x(Fe0.2Mn0.8)1−xO2, 0<x<1/3), indicating that partial substitution of Ti4+ for Mn4+ ion is effective for improving cycle performance under the practical lithium-ion cell configuration. The results presented above demonstrate that an Fe-substituted Li2MnO3 based positive electrode material can become an attractive candidate as an inexpensive constituent material for a large-scale lithium-ion battery by selecting suitable additional elements such as Ti and electrochemical charge conditions for activation.抄録全体を表示PDF形式でダウンロード (662K) -
荻原 隆, 小寺 喬之2013 年 60 巻 1 号 p. 9-12
発行日: 2013/01/15
公開日: 2013/03/01
ジャーナル オープンアクセスNa2/3Fe1/3Mn2/3O2 cathode active materials were prepared by spray pyrolysis. As-prepared powders had spherical morphology with dense microstructure which had an average diameter of about 1 µm with broad size distribution.The particle morphology of Na2/3Fe1/3Mn2/3O2 cathode active materials were influenced by the calcination and the polygonal morphology was obtained at 900 °C. XRD showed that as-prepared powders was well crystallized to P2 type structure after the calcination at 800 °C. The electrochemical measurement of Na2/3Fe1/3Mn2/3O2 cathode showed that the two plateaus were observed at 3 V and 4.3 V in rechargeable curve and the discharge capacity of Na2/3Fe1/3Mn2/3O2 cathode was 203 mAh/g at 0.01C. After 100th cycle, the discharge capacity and capacity retention of Na2/3Fe1/3Mn2/3O2 cathode was 116 mAh/g and 70 % at 0.1C, respectively.抄録全体を表示PDF形式でダウンロード (540K) -
竹内 友成, 蔭山 博之, 中西 康次, 太田 俊明, 作田 敦, 栄部 比夏里, 妹尾 博, 境 哲男, 辰巳 国昭, 小林 弘典, 小久 ...2013 年 60 巻 1 号 p. 13-18
発行日: 2013/01/15
公開日: 2013/03/01
ジャーナル オープンアクセスLi2S-FeS2 composite positive electrode materials were prepared for improving the discharge capacity of the all-solid-state In/Li2S cells via the electrical conductivity enhancement of Li2S. The electrochemical tests demonstrated that the In/Li2S-FeS2 (Li2S : FeS2 = 3 : 7 wt) cells showed relatively higher discharge capacity (ca. 180 mAh • g−1, normalized by the cathode weight) than that of the In/Li2S-C cells (ca. 140 mAh • g−1), due to the increased fraction of the active materials in the cathodes. The ex-situ XRD and S K-edge XAFS results indicated that the In/Li2S- FeS2 cells showed similar electrochemical reaction to that of the Li/Li2S-FeS2 cells with liquid electrolytes during charge, but did not proceed to form Li2S and Fe during discharge. Such difference was due to the limited amounts of Li ions supplied from the lithiated-In anode during discharge for the In/Li2S-FeS2 cells.抄録全体を表示PDF形式でダウンロード (606K) -
荻原 隆, 大村 卓也, 小寺 喬之2013 年 60 巻 1 号 p. 19-23
発行日: 2013/01/15
公開日: 2013/03/01
ジャーナル オープンアクセスRamsdellite type lithium titanate (Li2Ti3O7) powders were prepared by spray pyrolysis. Chemical and physical properties of Li2Ti3O7 powders were characterized by SEM, DTG, XRD and ICP. As-prepared Li2Ti3O7 precursor powders had a spherical morphology with hollow microstructure, but the irregular shaped morphology was obtained after the calcination above 900 °C. The crystal phase of ramsdellite Li2Ti3O7 was obtained by the calcination at 1100 °C. The first rechargeable capacities of Li2Ti3O7 anode were 168 mAh/g and 82 mAh/g at 0.1 mA/cm2 and 20 mA/cm2, respectively. The retention ratio of discharge capacity was 99 % at 1 mA/cm2 after 100th cycle. The cycle performance of Li2Ti3O7 anode had also high stability at 50 °C.抄録全体を表示PDF形式でダウンロード (694K) -
田港 聡, 平山 雅章, 山本 邦光, 鄭 月明, 菅野 了次2013 年 60 巻 1 号 p. 24-28
発行日: 2013/01/15
公開日: 2013/03/01
ジャーナル オープンアクセスLithium excess layered rocksalt material Li2RuO3 was synthesized by a solid-state reaction, and intercalation properties were characterized by electrochemical and structural investigations. The first discharge capacities of the Li2RuO3 electrode operated in charge/discharge ranges of 3.0−4.5 V, 1.0−4.5 V and 0.5−4.5 V were 165 mAh g−1, 450 mAh g−1, and 845 mAh g−1, respectively. X-ray absorption near edge structure spectra indicated that the valence states of Ru ions reversibly changed between 5+ and 0 at the range of 1.0−4.5 V. The Li2RuO3 electrode reversibly delivered a five-electron reaction in the charge/discharge ranges of 1.0−4.5 V.抄録全体を表示PDF形式でダウンロード (521K)
本会記事
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2013 年 60 巻 1 号 p. Pref1_1
発行日: 2013/01/15
公開日: 2013/03/01
ジャーナル オープンアクセスPDF形式でダウンロード (68K) -
2013 年 60 巻 1 号 p. Mtg1_2-Mtg1_6
発行日: 2013/01/15
公開日: 2013/03/01
ジャーナル オープンアクセスPDF形式でダウンロード (629K) -
2013 年 60 巻 1 号 p. 34
発行日: 2013/01/15
公開日: 2013/03/01
ジャーナル オープンアクセスPDF形式でダウンロード (123K)
お詫びと訂正
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日比野 敦, 伊藤 賢良2012 年 60 巻 1 号 p. 37
発行日: 2012/01/15
公開日: 2013/03/01
ジャーナル オープンアクセス本誌第59巻第12号に掲載の日比野敦氏，伊藤賢良氏の研究速報，「溶融AlへのMo線浸漬実験に基づくMo-Al系金属間化合物の燃焼合成過程の観察」につきまして，p. 705のFig.9に印刷の段階で誤りがございましたので，下記の通り訂正させていただきます.大変ご迷惑をお掛けしましたことをここにお詫び申し上げます.抄録全体を表示PDF形式でダウンロード (24K)
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