The present disclosure belongs to the technical field of lithium battery cathode materials, and discloses a preparation method of multiple carbon-coated high-compaction lithium iron manganese phosphate, comprising the following steps: (1) synthesizing a carbon and vanadium co-doped ferromanganese phosphate precursor through a co-precipitation method, sintering, and removing crystal water to obtain an anhydrous ferromanganese phosphate precursor; (2) adding lithium phosphate, a supplemental phosphorus source, an organic carbon source, a dopant and deionized water, and performing ball milling, wet sanding, spray drying and sintering to obtain an intermediate material; and (3) adding deionized water and the organic carbon source, then performing ball milling, sanding, spray drying, sintering and air jet pulverization to obtain multiple carbon-coated high-compaction lithium iron manganese phosphate.

There is provided a positive electrode for an alkaline secondary battery and an alkaline secondary battery having good output properties and cycle life. To that end, a positive electrode (10) for alkaline secondary battery is obtained by laminating a flexible metal substrate (11) having flexibility; a primer layer (12) having conductivity provided on one or both surfaces of the substrate (11); and a positive electrode composite material layer (13) provided on the primer layer (12) and containing a positive electrode active material, a binder resin, and a first conductive material.

A battery comprising an acidified metal oxide (“AMO”) material, preferably in monodisperse nanoparticulate form 20 nm or less in size, having a pH <7 when suspended in a 5 wt % aqueous solution and a Hammett function H.sub.0 >−12, at least on its surface.

An electrochemical battery cell comprising an anode having a primary anode active material, a cathode, and an ion-conducting electrolyte, wherein the cell has an initial output voltage, Vi, measured at 10% depth of discharge (DoD), selected from a range from 0.3 volts to 0.8 volts, and a final output voltage Vf measured at a DoD no greater than 90%, wherein a voltage variation, (Vi−Vf)/Vi, is no greater than ±10% and the specific capacity between Vi and Vf is no less than 100 mAh/g or 200 mAh/cm.sup.3 based on the cathode active material weight or volume, and wherein the primary anode active material is selected from lithium (Li), sodium (Na), potassium (K), magnesium (Mg), aluminum (Al), zinc (Zn), titanium (Ti), manganese (Mn), iron (Fe), vanadium (V), cobalt (Co), nickel (Ni), a mixture thereof, an alloy thereof, or a combination thereof.

A nanocomposite has a core-shell structure with an outer shell and an inner core. The, outer shell is a graphitized carbon film, and the inner core contains nickel oxide and alumina, with a nickel oxide content of 59%-80%, an alumina content of 19%-40%, and a carbon content of not more than 1%, based on the total weight of the nanocomposite. The process for catalytic combustion of volatile organic compounds may utilize the nanocomposite as a catalyst.

The disclosure provides a method of prelithiating an anode for a lithium-ion cell, the method comprising: (a) providing a pre-fabricated anode comprising an anode active material; (b) prelithiating the pre-fabricated anode by exposing the anode to a lithium source and an electrolyte solution, comprising a lithium salt dissolved in a liquid solvent, to enable lithium ions to intercalate into the anode active material until a level of lithium interaction from 5% to 100% of the maximum lithium storage capacity is achieved to form a prelithiated anode; and (c) introducing a protective polymer onto the prelithiated anode to prevent exposure of the prelithiated anode active material to the open air or into the anode to bond the prelithiated anode active material or to improve a structural integrity of the prelithiated anode, wherein the protective polymer has a lithium-ion conductivity from 10.sup.−8 S/cm to 5×10.sup.−2 S/cm at room temperature.

The present invention generally relates to a method for preparing metal oxide nanosheets. In a preferred embodiment, graphene oxide (GO) or graphite oxide is employed as a template or structure directing agent for the formation of the metal oxide nanosheets, wherein the template is mixed with metal oxide precursor to form a metal oxide precursor-bonded template. Subsequently, the metal oxide precursor-bonded template is calcined to form the metal oxide nanosheets. The present invention also relates to a lithium-ion battery anode comprising the metal oxide nanosheets. In a further preferred embodiment, the battery anode may comprise a reduced template, which is reduced graphene oxide (rGO) or reduced graphite oxide.

The present invention relates to a calcium-based secondary cell containing: an electrolyte arranged between the negative electrode and the positive electrode and comprising a calcium salt of a fluorine-containing anion of formula (XF.sub.n).sup.m− wherein n is a positive integer of at most 6 and m is a positive integer of at least 1 and m<n, a positive-electrode active material at the positive electrode which is a one-dimensional structure accommodating Ca.sup.2+ ions and has the formula (1):
Ca.sub.n+2Me1.sub.(n+1)−y−zMe2.sub.yMe3.sub.zO.sub.3n+3  (1)
wherein: Me1, Me2, Me3 are different transition metals; 1≤n and n is not necessarily an integer; 0≤y and y is not necessarily an integer; 0≤z and z is not necessarily an integer.

A sodium-ion battery comprising a biochar-based anode layer, an NaNiO.sub.2 cathode layer, and an metakaolin solid electrolyte pellets layer.

The present disclosure generally relates to apparatus and processes for monitoring the structural health of an energy storage device, and more specifically to energy storage devices with operando monitoring and processes of use. In an aspect, an apparatus is provided that includes an energy storage device comprising an electrode, the electrode comprising a nanotube network and an active material. The apparatus further includes a processor configured to determine a first value of potential change of the electrode of the energy storage device and to compare the first value of potential change to a threshold value or range.