Abstract:
Prepare a thermoplastic polymer foam having a porosity of 70% or more and at least one of: (i) an average cell size of 200 nanometers or less; and (ii) a nucleation density of at least 1×1015 effective nucleation sites per cubic centimeter of foamable polymer composition not including blowing agent using a foamable polymer composition containing a thermoplastic polymer selected from styrenic polymer and (meth)acrylic polymers, a blowing agent comprising at least 20 mole-percent carbon dioxide based on moles of blowing agent and an additive having a Total Hansen Solubility Parameter that differs from that of carbon dioxide by less than 2 and that is present at a concentration of 0.01 to 1.5 weight parts per hundred weight parts thermoplastic polymer.
Abstract:
Prepare a thermoplastic polymer foam having a porosity of 70% or more and at least one of: (i) an average cell size of 200 nanometers or less; and (ii) a nucleation density of at least 1×1015 effective nucleation sites per cubic centimeter of foamable polymer composition not including blowing agent using a foamable polymer composition containing a thermoplastic polymer selected from styrenic polymer and (meth)acrylic polymers, a blowing agent comprising at least 20 mole-percent carbon dioxide based on moles of blowing agent and an additive having a Total Hansen Solubility Parameter that differs from that of carbon dioxide by less than 2 and that is present at a concentration of 0.01 to 1.5 weight parts per hundred weight parts thermoplastic polymer.
Abstract:
Olivine lithium manganese iron phosphate is made in a coprecipitation process from a water/alcoholic cosolvent mixture. The LMFP particles so obtained exhibit surprisingly high electronic conductivities, which in turn leads to other advantages such as high energy and power densities and excellent cycling performance.
Abstract:
An inexpensive method for making lithium transition metal olivine particles that have high specific capacities is disclosed. The method includes the steps of: a) combining precursor materials including at least one source of lithium ions, at least one source of transition metal ions, at least one source of HxP04 ions where x is 0-2 and at least one source of carbonate, hydrogen carbonate, formate and/or acetate ions in a mixture of water and a liquid cosolvent which is miscible with water at the relative proportions of water and cosolvent that are present and which liquid cosolvent has a boiling temperature of at least 130° C.; wherein the mole ratio of lithium ions to HxP04 ions is from 0.9:1 to 1.2:1, and a lithium transition metal phosphate and at least one of carbonic acid, formic acid or acetic acid are formed, b) heating the resulting mixture at a temperature of up to 120° C. to selectively remove the carbonic acid, formic acid, acetic acid and/or carbon-containing decomposition products thereof from the reaction mixture, optionally remove some or all of the water from the reaction mixture and produce lithium transition metal olivine particles, and then c) separating the lithium transition metal olivine particles from the liquid cosolvent.
Abstract translation:公开了制造具有高比容量的锂过渡金属橄榄石颗粒的廉价方法。 该方法包括以下步骤:a)组合包括至少一种锂离子源,至少一种过渡金属离子源,至少一种H x PO 4离子源,其中x为0-2的至少一种源和至少一种碳酸根 ,水和液体共溶剂的混合物中的碳酸氢盐,甲酸盐和/或乙酸根离子,其与存在的水和共溶剂的相对比例与水可混溶,哪种液体助溶剂的沸点温度为至少130℃。 ; 其中锂离子与HxP04离子的摩尔比为0.9:1至1.2:1,并且形成锂过渡金属磷酸盐和至少一种碳酸,甲酸或乙酸,b)将所得混合物加热至 温度高达120℃以选择性地从反应混合物中除去碳酸,甲酸,乙酸和/或含碳的分解产物,任选地从反应混合物中除去一些或全部水,并产生锂过渡 金属橄榄石颗粒,然后c)从液体助溶剂中分离锂过渡金属橄榄石颗粒。