Resistive switching devices that contain lithium, including resistive switching devices containing a lithium titanate, and associated systems and methods are generally described. In some cases, the resistive switching device contains a lithium titanate-containing domain, a first electrode, and a second electrode. In some cases, the application of an electrical potential to the resistive switching device causes a change in resistance state of the lithium titanate-containing domain. The resistive switching devices described herein may be useful as memristors, and in applications that include Resistive-random access memory and neuromorphic computing.

A method for the synthesis of lithium titanate, the method comprising the method steps of: (i) reacting a source of titanium ions with a source of lithium ions at increased temperature in one or more reaction vessels for a period of time; and (ii) calcining the product of step (i) to produce a lithium titanate product having a nano-tube type crystal structure. An electrode material produced by the method of the invention and a lithium ion battery utilising the electrode material are also disclosed.

A positive electrode active material for obtaining a lithium ion secondary battery, wherein capacity, electron conductivity, durability, and heat stability at the time of overcharge are improved, durability and heat stability being achieved at a high level, and including: a lithium nickel manganese composite oxide composed of secondary particles, in which a plurality of primary particles are flocculated, wherein the composite oxide is represented by a general formula (1): Li.sub.dNi.sub.1-a-b-cMn.sub.aM.sub.bTi.sub.cO.sub.2 (wherein, M is at least one kind of element selected from Co, W, Mo, V, Mg, Ca, Al, Cr, Zr and Ta, 0.05a0.60, 0b0.60, 0.02c0.08, 0.95d1.20), at least a part of titanium in the composite oxide is solid-solved in the primary particles, and, a lithium titanium compound exists on a surface of the positive electrode active material for the lithium ion secondary battery.

A solid-state electrolyte including a polymer, which can be ion-conducting or non-conducting; an ion-conducting inorganic material; a lithium salt; an additive salt and optionally a coupling agent.

Synthesis process for new particles of Li.sub.4Ti.sub.5O.sub.12, Li.sub.(4-)Z.sub.Ti.sub.5O.sub.12 or Li.sub.4Z.sub.Ti.sub.(5-)O.sub.12, preferably having a spinel structure, wherein is greater than 0 and less than or equal to 0.5 (preferably having a spinel structure), representing a number greater than zero and less than or equal to 0.33, Z representing a source of at least one metal, preferably chosen from the group made up of Mg, Nb, Al, Zr, Ni, Co. These particles coated with a layer of carbon notably exhibit electrochemical properties that are particularly interesting as components of anodes and/or cathodes in electrochemical generators.

A positive electrode active material for a lithium ion secondary battery has a rock salt type structure represented by General Formula:
Li.sub.xTi.sub.2x-1Mn.sub.2-3xO (0.50<x<0.67)(1)
and has an average particle size of 0.5 m or less.

A high-rate lithium cobaltate cathode material, which contains a multi-channel network formed by fast ionic conductor Li.sub.M.sub.O.sub., mainly consists of lithium cobaltate. The lithium cobaltate is melted together with the fast ionic conductor Li.sub.M.sub.O.sub. in the form of primary particles to form secondary particles. Besides, the lithium cobaltate is embedded in the multi-channel network formed by fast ionic conductor Li.sub.M.sub.O.sub.. The element M in Li.sub.M.sub.O.sub. is one or more of Ti, Zr, Y, V, Nb, Mo, Sn, In, La, W and 14, 15, 212. The lithium cobaltate cathode material is mainly obtained by uniformly mixing cobaltous oxide impregnated with a hydroxide of M and lithium source, then by the sintering reaction in an air atmosphere furnace at a high temperature. The product of the present invention can greatly promote the lithium ion conductivity of the lithium cobaltate cathode material during the charging and discharging process of the lithium-ion battery, and improve the rate performance of the material.

Provided is an alkali metal titanate which, when used as a constituent material of a friction material, is excellent in heat resistance and friction force and capable of effectively suppressing wear of a mating material disposed to face the friction material. The alkali metal titanate includes a sodium atom and a silicon atom. The content of the sodium atom is 2.0 to 8.5 mass %. The content of the silicon atom is 0.2 to 2.5 mass %. The ratio of the content of an alkali metal atom other than the sodium atom to the content of the sodium atom is 0 to 6.

There is demand for a power storage device composition that: compared to past lithium compounds, can suppress development of conductivity caused by blue discoloration (reduction), even when used in a reducing atmosphere; and can inhibit the generation of gases, such as carbon dioxide gas, hydrogen gas, and fluoride gas, that has been a problem in past power storage devices during use and with aging. This power storage device composition is characterized by including, as a principal component, Li.sub.2TiO.sub.3 that has an x-ray diffraction pattern for which the intensity ratio (A/B) of the peak intensity (A) at a diffraction angle of 2=18.40.1 and the peak intensity (B) at a diffraction angle of 2=43.70.1 is at least 1.10.

The present disclosure relates to a negative electrode active material having excellent output characteristics and causing little gas generation, and an electrode including the negative electrode active material. The negative electrode active material includes metal oxide-lithium titanium oxide (MO-LTO) composite particles which have a shape of secondary particles formed by aggregation of primary particles, wherein the primary particles have a core-shell structure including a core and a shell totally or at least partially covering the surface of the core, the core includes primary particles of lithium titanium oxide (LTO), and the shell includes a metal oxide.