摘要:
Process for improving the electrochemical performance of an alkali metal oxyanion electrode material having a pyrolitic carbon deposit thereon, comprising a heat treatment under a humidified atmosphere where the heat treatment is performed at a temperature in the range of about 300° C. to about 950° C.
摘要:
A process for preparing an alkali metal oxyanion electrode material having a carbon coating deposited by a thermal treatment, said process comprising a thermal step under a humidified atmosphere of: (i) said alkali metal oxyanion electrode material having a carbon coating deposited by a thermal treatment; (ii) precursors of said alkali metal oxyanion electrode material and an organic precursor of carbon; or (iii) said alkali metal oxyanion electrode material and an organic precursor of carbon, wherein said thermal step is performed at a temperature in the range of about 300° C. to about 950° C.
摘要:
The invention relates to a process for the preparation of a carbon-treated complex oxide having a very low water content and to its use as cathode material.The carbon-treated complex oxide is composed of particles of a compound AMXO4 having an olivine structure which carry, on at least a portion of their surface, a film of carbon deposited by pyrolysis. A represents Li, alone or partially replaced by at most 10% as atoms of Na or K. M represents Fe(II), alone or partially replaced by at most 50% as atoms of one or more other metals chosen from Mn, Ni and Co, and/or by at most 10% as atoms of one or more aliovalent or isovalent metals other than Mn, Ni or Co, and/or by at most 5% as atoms of Fe(III). X4 represents PO4, alone or partially replaced by at most 10 mol % of SO4 and SiO4. Said material has a water content
摘要翻译:本发明涉及一种制备具有非常低含水量并用作阴极材料的碳处理复合氧化物的方法。 碳处理的复合氧化物由具有橄榄石结构的化合物AMXO4的颗粒组成,在其表面的至少一部分上承载通过热解沉积的碳膜。 A表示单独或部分被Na或K原子替代为至多10%的Li。M表示Fe(II),单独或部分被至多50%替代为选自Mn,Ni的一种或多种其它金属的原子, Co,和/或至多10%作为除Mn,Ni或Co以外的一种或多种异构或异质金属的原子,和/或至多5%作为Fe(III)的原子。 X 4表示PO 4,单独或部分被至多10mol%的SO 4和SiO 4代替。 所述材料的含水量<1000ppm。
摘要:
A process for preparing an at least partially lithiated transition metal oxyanion-based lithium-ion reversible electrode material, which includes providing a precursor of said lithium-ion reversible electrode material, heating said precursor, melting same at a temperature sufficient to produce a melt including an oxyanion containing liquid phase, cooling said melt under conditions to induce solidification thereof and obtain a solid electrode that is capable of reversible lithium ion deinsertion/insertion cycles for use in a lithium battery. Also, lithiated or partially lithiated oxyanion-based-lithium-ion reversible electrode materials obtained by the aforesaid process.
摘要:
A process for preparing an at least partially lithiated transition metal oxyanion-based lithium-ion reversible electrode material, which includes providing a precursor of said lithium-ion reversible electrode material, heating said precursor, melting same at a temperature sufficient to produce a melt including an oxyanion containing liquid phase, cooling said melt under conditions to induce solidification thereof and obtain a solid electrode that is capable of reversible lithium ion deinsertion/insertion cycles for use in a lithium battery. Also, lithiated or partially lithiated oxyanion-based-lithium-ion reversible electrode materials obtained by the aforesaid process.
摘要:
A process for preparing an at least partially lithiated transition metal oxyanion-based lithium−ion reversible electrode material, which includes providing a precursor of said lithium−ion reversible electrode material, heating said precursor, melting same at a temperature sufficient to produce a melt including an oxyanion containing liquid phase, cooling said melt under conditions to induce solidification thereof and obtain a solid electrode that is capable of reversible lithium ion deinsertion/insertion cycles for use in a lithium battery. Also, lithiated or partially lithiated oxyanion-based-lithium−ion reversible electrode materials obtained by the aforesaid process.
摘要:
The invention concerns novel ionic compounds with low melting point whereof the onium type cation having at least a heteroatom such as N, O, S or P bearing the positive charge and whereof the anion includes, wholly or partially, at least an ion imidide such as (FX1O)N−(OX2F) wherein X1 and X2 are identical or different and comprise SO or PF, and their use as solvent in electrochemical devices. Said composition comprises a salt wherein the anionic charge is delocalised, and can be used, inter alia, as electrolyte.
摘要:
A process for preparing an at least partially lithiated transition metal oxyanion-based lithium-ion reversible electrode material, which includes providing a precursor of said lithium-ion reversible electrode material, heating said precursor, melting same at a temperature sufficient to produce a melt including an oxyanion containing liquid phase, cooling said melt under conditions to induce solidification thereof and obtain a solid electrode that is capable of reversible lithium ion deinsertion/insertion cycles for use in a lithium battery. Also, lithiated or partially lithiated oxyanion-based-lithium-ion reversible electrode materials obtained by the aforesaid process.
摘要:
The invention concerns novel ionic compounds with low melting point whereof the onium type cation having at least a heteroatom such as N, 0, S or P bearing the positive charge and whereof the anion includes, wholly or partially, at least an ion imidide such as (FXI0)N—(OX2F) wherein X1 and X2 are identical or different and comprise SO or PF, and their use as solvent in electrochemical devices. Said composition comprises a salt wherein the anionic charge is delocalised, and can be used, inter alia, as electrolyte.
摘要:
The invention concerns novel ionic compounds with low melting point whereof the onium type cation having at least a heteroatom such as N, O, S or P bearing the positive charge and whereof the anion includes, wholly or partially, at least an ion imidide such as (FX1O)N−(OX2F) wherein X1 and X2 are identical or different and comprise SO or PF, and their use as solvent in electrochemical devices. Said composition comprises a salt wherein the anionic charge is delocalised, and can be used, inter alia, as electrolyte.