A magnesium-ion battery includes a solid, mechanically flexible polymer-based anode, a solid, mechanically flexible polymer-based cathode, and a polymer gel electrolyte in contact with the anode and the cathode. An electrode can include bismuth nanostructure powder and an electrolyte binder, or tungsten disulfide and an electrolyte binder.

A solid-state battery cell for a lithium ion battery is disclosed. The battery cell includes a first electrode; a second electrode; and an ionically conductive layer sandwiched between the first electrode and the second electrode. At least one of the first electrode and the second electrode includes an electronically conductive polymer (ECP). The at least one of the first electrode and the second electrode comprises about 20-98 weight percent (wt %) of an active material, about 0.1-30 wt % of the ECP, and about 5-70 wt % of an ionically conductive material that includes one or more of a solid-state electrolyte (SSE) material and a lithium salt.

Energy storage devices, battery cells, and batteries may include a first current collector having an anode active material disposed along a first surface of the first current collector. The cells may include a plurality of first electrodes positioned along a second surface of the first current collector opposite the first surface. The plurality of first electrodes may be characterized by a first orientation. The cells may include a second current collector having a cathode active material disposed along a first surface of the second current collector. The cells may include a separator positioned between the anode active material and the cathode active material. The cells may also include a plurality of second electrodes positioned along a second surface of the second current collector opposite the first surface. The plurality of second electrodes may be characterized by a second orientation substantially orthogonal to the first orientation.

An energy storage module includes: a plurality of battery cells arranged in a first direction such that long side surfaces of adjacent ones of the battery cells face one another; a plurality of insulation spacers, at least one of the insulation spacers being between each adjacent pair of the battery cells, each of the insulation spacers including a heat-insulating first sheet and a plurality of flame-retardant second sheets respectively adhered to opposite surfaces of the first sheet by an adhesion member; a cover member including an internal receiving space configured to accommodate the battery cells and the insulation spacers; a top plate coupled to the cover member, the top plate including ducts respectively corresponding to vents of the battery cells and having fire extinguishing agent openings respectively corresponding to the insulation spacers; a top cover coupled to the top plate and having discharge openings respectively corresponding to the ducts; and an extinguisher sheet between the top cover and the top plate.

An electrode including an electrode active material and a ceramic hydrofluoric acid (HF) scavenger is provided. The ceramic hydrofluoric acid (HF) scavenger includes M.sub.2SiO.sub.3, MAlO.sub.2, M.sub.2OAl.sub.2O.sub.3SiO.sub.2, or combinations thereof, where M is lithium (Li), sodium (Na), or combinations thereof. Methods of making the electrode are also provided.

The present application provides a positive electrode plate, a secondary battery and a power consuming device. The positive electrode plate may comprise a positive electrode current collector, a positive electrode film layer provided on at least one surface of the positive electrode current collector, and a conductive undercoat layer between the positive electrode current collector and the positive electrode film layer, wherein the positive electrode film layer may include a positive electrode film layer comprising a positive electrode active material with a core-shell structure, the positive electrode active material may comprise an inner core and a shell coating the inner core, and the conductive primer layer may comprise a first polymer, a first water-based binder and a first conductive agent.

A silicon-based anode material and a preparation method thereof are provided. The silicon-based anode material includes a silicon-based core and a coating layer, the silicon-based core includes nano silicon and a lithium-containing silicon oxide, and the coating layer at least includes a polymer layer with SiOSi bonds. The preparation method of a silicon-based anode material includes (I) preparing a silicon-based core; and (II) coating a polymer layer. The silicon-based anode material includes high initial Coulombic efficiency and initial lithium intercalation capacity. The polymer layer with SiOSi bonds in the coating layer is insoluble in water, which avoid problems such as slurry sedimentation and poor coating performance, making the silicon-based anode material have good processing performance.

An active material formulation comprising a sulfur-based material and an electrically conductive composition is described, wherein the electrically conductive composition comprises carbon nanotubes and carbon fibers. A process is also described for preparing the active material formulation, a catholyte comprising the formulation, a cathode comprising the catholyte and an accumulator comprising the cathode.

Electrolytes, anodes, lithium ion cells and methods are provided for preventing lithium metallization in lithium ion batteries to enhance their safety. Electrolytes comprise up to 20% ionic liquid additives which form a mobile solid electrolyte interface during charging of the cell and prevent lithium metallization and electrolyte decomposition on the anode while maintaining the lithium ion mobility at a level which enables fast charging of the batteries. Anodes are typically metalloid-based, for example include silicon, germanium, tin and/or aluminum. A surface layer on the anode bonds, at least some of the ionic liquid additive to form an immobilized layer that provides further protection at the interface between the anode and the electrolyte, prevents metallization of lithium on the former and decomposition of the latter.

Provided is a composition for an electrochemical device functional layer capable of providing an electrochemical device having low volume expansion. The composition for an electrochemical device functional layer contains a solvent and a polymer including an oxide structure-containing monomer unit. The oxide structure-containing monomer unit has a structure indicated by the following formula (I) (in formula (I), R.sup.1 represents an optionally substituted alkylene group and n is a positive integer), and the polymer has a number-average molecular weight of not less than 5,000 and not more than 15,000.

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