Abstract: The present invention relates to an electrolyte composition for a lithium ion battery, the composition including: (a) 7-36 wt % of lithium bis(fluorosulfonyl)imide; (b) 0.6-6 wt % of further lithium salt(s), selected from one or more of lithium difluoro (oxalato) borate, lithium difluorophosphate, lithium bis(oxalato) borate and lithium hexafluorophosphate; (c) 2-10 wt % of additive; wherein the additive comprises vinylene carbonate and/or fluoroethylene carbonate; and (d) 50-85 wt % solvent; wherein the solvent comprises one or more of dimethyl carbonate, diethyl carbonate and ethyl methyl carbonate; wherein all weight percentages are calculated relative to weight of the whole the electrolyte composition.

Abstract: There is provided a cathode composition for a battery of the general formula: Li1+aMn1?bMg1?cO2; wherein the values of a, b and c are greater than 0. There is also provided a method of making the cathode composition for a battery, a cathode containing the cathode composition, and an electrochemical cell containing the cathode.

Abstract: There is provided a cathode composition for a battery of the general formula: Li1+aMn1?bTi1?cO2; wherein the values of a, b and c are greater than 0. There is also provided a method of making the cathode composition for a battery, a cathode containing the cathode composition, and an electrochemical cell containing the cathode.

Abstract: There is provided a cathode composition for a battery of the general formula: Mg1+xNi1?xO2 or Mg1+xMn1?xO2; wherein the value of x is greater than 0. There is also provided a method of making the cathode composition for a battery, a cathode containing the cathode composition, and an electrochemical cell containing the cathode.

Abstract: A cathode composition for a battery of the general formula: Li1+aMn1?bNi1?cO2, wherein the values of a, b and c are greater than 0. There is also provided a method of making the cathode composition for a battery, a cathode containing the cathode composition, and an electrochemical cell containing the cathode.

Abstract: A cathode composition for a battery of the general formula: Li1+aMn1?bAl1?cO2; wherein the values of a, b and c are greater than 0. There is also provided a method of making the cathode composition for a battery, a cathode comprising the cathode composition, and an electrochemical cell comprising the cathode.

Abstract: A thermally manufactured separator for a cell and a method of making the same. The separator includes a polymer matrix and a plasticiser, and the separator is substantially free from electrolyte.

Abstract: An electrolyte composition for a lithium ion battery. The composition includes 5-25 wt % of lithium salt, 2-10 wt % of additive and 65-93 wt % of solvent. The lithium salt includes 20-100 mol % lithium tetrafluoroborate, and 0-95 mol % lithium bis(trifluoromethanesulfonyl)imide; (b) the additive includes vinylene carbonate, and optionally 30-90 mol % fluoroethylene carbonate; and (c) the solvent includes 70-90 mol % ethylene carbonate and 10-30 mol % propylene carbonate.

Abstract: An electrolyte composition for a lithium ion battery. The composition includes 5-25 wt % of lithium salt, 2-10 wt % of additive and 65-93 wt % of solvent. The lithium salt includes 20-100 mol % of lithium 2-trifluoromethyl-4,5-dicyanoimidazolide or lithium bis(oxalato) borate or a mixture thereof, and 0-95 mol % lithium bis(fluorosulfonyl)imide. The additive includes 30-90 mol % fluoroethylene carbonate and 10-70 mol % vinylene carbonate. The solvent includes 70-90 mol % ethylene carbonate and 10-30 mol % propylene carbonate.

Abstract: An electrolyte composition for a lithium ion battery. The composition including: (a) 5-35 wt % of lithium salt; (b) 2-10 wt % of additive; and (c) 55-93 wt % solvent. The lithium salt includes: (ai) a salt selected from lithium 2-trifluoromethyl-4,5-dicyanoimidazolide, lithium difluoro(oxalato)borate, lithium bis(oxalato) borate and lithium tetrafluroborate; (aii) and optionally, a co-salt selected from lithium bis(trifluoromethanesulfonyl)imide and/or lithium bis(fluorosulfonyl)imide. The molar ratio of the salt to co-salt is between 100:0 and 5:95. The composition does not include lithium bis(fluorosulfonyl)imide alongside lithium difluoro(oxalato)borate or lithium tetrafluroborate. The additive includes vinylene carbonate and optionally, fluoroethylene carbonate. The solvent includes either (ci) ethylene carbonate and 10-30 mol % propylene carbonate, or (cii) ?-butyrolactone and optionally ethylene carbonate.

Abstract: A method for making an electrode for a battery includes: providing a current collector having a current collector surface; forming an electrode precursor by arranging a plurality of extruded electrode elements on the current collector surface, each electrode element defining an element height above the current collector surface, and neighbouring electrode elements being separated by a spacing; and forming an electrode from the electrode precursor by compressing the electrode elements, thereby reducing the element height of each electrode element and closing the spacing until neighbouring electrode elements meet to form an electrode layer.

Abstract: Apparatus for making an electrode-electrolyte structure includes: a die head defining a substrate pathway for passage of an electrode substrate through the die head from a substrate inlet to a substrate outlet, and an electrolyte pathway for passage of an electrolyte gel through the die head; an electrode feeder for feeding an electrode substrate along the substrate pathway; and an electrolyte feeder for feeding a polymer gel electrolyte along the electrolyte pathway. The electrolyte pathway is arranged to meet the substrate pathway at a junction arranged between the substrate inlet and the substrate outlet, to extrude the electrolyte onto the electrode substrate as it is fed along the substrate pathway.

Abstract: A compound of the general formula: Li ( 4 3 - 2 ? x 3 - y 3 - z 3 ) ? Ni x ? Co y ? Al z ? Mn ( 2 3 - K 3 - 2 ? y 3 - 2 ? z 3 ) ? O 2 wherein x is equal to or greater than 0 and equal to or less than 0.4; y is equal to or greater than 0.1 and equal to or less than 0.4; and z is equal to or greater than 0.02 and equal to or less than 0.3. The compound is also formulated into a positive electrode for use in an electrochemical cell.

Abstract: A cathode composition for a lithium-ion cell or battery of the general formula: Li1+xMn1?xO2, wherein the composition is in the form of a single phase having a rock salt crystal structure such that an x-ray diffraction pattern of the composition has an absence of peaks below a 20 value of 35; and the value of x is greater than 0, and equal to or less than 0.3. The compound is also formulated into a positive electrode, or cathode, for use in an electrochemical cell.

Abstract: A cathode composition for a lithium-ion cell or battery of the general formula: Li1+xMn1?xO2, wherein the composition is in the form of a single phase having a rock salt crystal structure; and the value of x is greater than 0, and equal to or less than 0.3. The compound is also formulated into a positive electrode, or cathode, for use in an electrochemical cell.

Abstract: Use of cobalt in a cathode material of the general formula: Li (4/3-2x/3-y/3) NixCoyMn(2/3- x/3-2y/3)O2 for increasing the charge capacity of the material and for suppressing gas evolution from the cathode material during a charge cycle.

Abstract: A compound of the general formula: Li(4/3?2x/3?y/3?z/3) NixCoyAlzMn(2/3?x/3?2y/3?2z/3)O2 wherein x is equal to or greater than 0.2 and equal to or less than 0.55; y is equal to or greater than 0.025 and equal to or less than 0.325; and z is equal to or greater than 0.025 and equal to or less than 0.075. In another embodiment, y=0, xis equal to or greater than 0.525 and equal to or less than 0.55; and z is equal to 0.05. The compound is also formulated into a positive electrode for use in an electrochemical cell.

Abstract: Use of aluminum in a lithium rich cathode material of the general formula (I) for suppressing gas evolution from the cathode material during a charge cycle and for increasing the charge capacity of the cathode material.

Abstract: Use of nickel in a cathode material of the general formula Li (4/3-2x/3-y/3-z/3)NixCoyAlzMn(2/3-x/3-2y/3-2z/3)02 wherein x is greater than 0.06 and equal to or less than 0.4; y is equal to or greater than 0 and equal to or less than 0.4; and z is equal to or greater than 0 and equal to or less than 0.05 for suppressing gas evolution during a charge cycle and/or increasing the charge capacity of the material.

Abstract: A compound of the general formula: wherein x is equal to or greater than 0.175 and equal to or less than 0.325 and y is equal to or greater than 0.05 and equal to or less than 0.35. In another embodiment, x is equal to zero and y is greater than 0.12 and equal to or less than 0.4. The compound is also formulated into a positive electrode for use in an electrochemical cell.