ENDOTHERMIC PARTICLES FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

• Main Authors: FUKATANI TOMOYUKI, BACK JIN SOK
• Format: Patent
• Language: English; Japanese
• Published: 13.10.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide endothermic particles capable of keeping the internal temperature of a non-aqueous electrolyte secondary battery at a lower temperature even in such an environment that the internal temperature under a high-temperature environment tends to rise.SOLUTION: An endothermic particle for a non-aqueous electrolyte secondary battery is at least partially modified metal hydroxide particle. A desorbed CH4 amount (MS1) from 80 to 1400°C by a temperature programmed desorption gas mass spectrometer (TDS-MS) is 15×10-6 mol/g or more and 3000×10-6 mol/g or less, a desorbed CH3OH amount (MS2) from 80°C to 1400°C by TDS-MS is 50×10-6 mol/g or more and 6000×10-6 mol/g or less, a desorbed H2O amount (MS3) from 80°C to 200°C by TDS-MS is 30×10-6 mol/g or more and 1500×10-6 mol/g or less, the specific surface area (BET1) calculated from an adsorption isotherm measured by adsorbing water vapor is 8 m2/g or more and 600 m2/g or less, the specific surface area (BET2) calculated from the adsorption isotherm measured by adsorbing nitrogen is 8 m2/g or more and 600 m2/g or less.SELECTED DRAWING: None 【課題】高温環境下等の内部温度が上昇しやすい環境下においても非水電解質二次電池の内部温度をより低温に保つことができる吸熱粒子を提供する。【解決手段】少なくとも一部が改質された金属水酸化物粒子であって、昇温脱離ガス質量分析計（ＴＤＳ－ＭＳ）による８０～１４００℃までの脱離ＣＨ４量（ＭＳ１）が１５×１０-6mol／ｇ以上３０００×１０-6mol／ｇ以下であり、ＴＤＳ－ＭＳによる８０℃～１４００℃までの脱離ＣＨ３ＯＨ量（ＭＳ２）が５０×１０-6mol／ｇ以上６０００×１０-6mol／ｇ以下であり、ＴＤＳ－ＭＳによる８０℃～２００℃までの脱離Ｈ２Ｏ量（ＭＳ３）が３０×１０-6mol／ｇ以上１５００×１０-6mol／ｇ以下であり、水蒸気を吸着させて測定される吸着等温線によって算出される比表面積（ＢＥＴ１）が８ｍ2／ｇ以上６００ｍ2／ｇ以下であり、窒素を吸着させて測定される吸着等温線によって算出される比表面積（ＢＥＴ２）が８ｍ2／ｇ以上６００ｍ2／ｇ以下であることを特徴とする非水電解質二次電池用吸熱粒子。【選択図】なし