成果報告書詳細
管理番号20150000000221
タイトル*平成26年度中間年報 先進・革新蓄電池材料評価技術開発
公開日2015/5/26
報告書年度2014 - 2014
委託先名技術研究組合リチウムイオン電池材料評価研究センター
プロジェクト番号P13007
部署名スマートコミュニティ部
和文要約
英文要約1. Outline and Achievements of Research & Development
a) Leading-edge Lithium Ion Batteries
1) Battery-evaluation-method development of High potential positive electrode(LNMO)
Cycle performance of the battery at 25℃ was improved with electrolyte additives. It lasted up to at 250 cycles at a good level. But Gas evolved inside the battery at 45℃ and at 60℃. More study is necessary to solve this issue. Documents on both battery- assembling-method and preliminary battery-evaluation-protocol were developed.
2) Battery-evaluation-method development of High capacity positive electrode(213 solid solution)
Much effort was taken to elucidate the correlation of electrode-formulation-method with electric capacity and to make clear the mechanism of high capacity through the analysis of crystal structure change. The capacity fade on cycling were clarified by combined analyses attributable to the active-material-structure transformation from layered to spinel phase and the elution of Ni and Mn components into the electrolyte.
 3) Battery-evaluation-method development of High capacity negative electrode (Si materials)
  The battery model for evaluation with which Si- negative-electrode material itself can be validated was developed. Methodology of measuring expansion and contract of Si materials with both high precision and in-depth has been required. The new optical measuring system with 3 digit of high dissolution was invented for this request, compared with the existing contact method.
 4) Battery-evaluation-method development of Flame-retardant electrolyte (battery)
 In this research & development, safety measurements on material itself were specifically focused and concentrated. Several kinds of evaluation methods were newly developed on the thermal stability of the materials. Small size of pouch cell and model cells adapted well to the thermal analysis equipment were developed.
b) Innovative Battery
Material-evaluation-method development for Innovative battery with new material(s)
Development of both battery-assembling method and battery-evaluation-protocol for the pressurized battery comprised of powder-molded-components, was promoted to validate the electrolyte materials and the active materials for the all solid-state battery of sulfide system. Experimental equipment for the formulation of sheet-type electrodes were selected and installed, then batteries were assembled with them and battery evaluation started. Synthesis of organic-sulfur-composite for the high capacity positive electrode has been tried in parallel. The organic-sulfur-composite material with specific capacity of more than 600mAh/g was gained.
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