A positive electrode active material for a secondary battery includes a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn), and a glassy coating layer formed on surfaces of particles of the lithium composite transition metal oxide, wherein, in the lithium composite transition metal oxide, an amount of the nickel (Ni) in a total amount of transition metals is 60 mol % or more, and an amount of the manganese (Mn) is greater than an amount of the cobalt (Co), and the glassy coating layer includes a glassy compound represented by Formula 1.

Li.sub.aM.sup.1.sub.bO.sub.c  [Formula 1] wherein, M.sup.1 is at least one selected from the group consisting of boron (B), aluminum (Al), silicon (Si), titanium (Ti), and phosphorus (P), and 1≤a≤4, 1≤b≤8, and 1≤c≤20.

A solid electrolyte material, a solid electrolyte, a method for producing the solid electrolyte, and an all-solid-state battery. The solid electrolyte material includes lithium, tantalum, phosphorus, and oxygen as constituent elements and includes at least one element selected from boron, niobium, silicon, and bismuth as a constituent element, and is amorphous.

An ion conductive solid comprising an oxide represented by general formula: Li.sub.6-x-y-2zY.sub.1-x-y-zM1.sub.xM2.sub.yM3.sub.zB.sub.3O.sub.9 in formula, M1 and M2 are each independently at least one metal element selected from a group of Zr, Ce and Sn, M3 is Nb, and x, y, and z represent real numbers satisfying 0.000≤x+y<1.000, 0.000≤z≤1.000, and 0.000<x+y+z<1.000.

The present disclose provides a process. In an embodiment, the process includes reacting boric acid with potassium carbonate in an aqueous solution. The process includes forming a stable aqueous suspension comprising particles of potassium pentaborate. The present disclosure also provides the composition formed the process. In an embodiment, the composition includes a stable aqueous suspension of particles of potassium pentaborate, the suspension composed of at least 8% (w/w) boron and at least 5% (w/w) potassium oxide (K.sub.2O).

The present invention has an object to provide a positive electrode active material for a non-aqueous electrolyte secondary battery which not only suppresses gelation of a positive electrode mixed material paste upon producing the non-aqueous electrolyte secondary battery but also improves the stability thereof. Provided is the positive electrode active material represented by general formula Li.sub.sNi.sub.1−x−y−zCo.sub.xMn.sub.yM.sub.zO.sub.2+α (0≤x≤0.35, 0≤y≤0.35, 0≤z≤0.10, 0.95<s<1.30, and 0≤α≤0.2, and M represents at least one element selected from V, Mg, Mo, Nb, Ti, W, and Al) and containing secondary particles formed by agglomeration of primary particles, wherein at least part of the surface of the primary particles thereof is covered with a lithium boron compound, and the amount of redundant lithium hydroxide of the positive electrode active material measured with a neutralization titration is at least 0.003% by mass and up to 0.5% by mass relative to the total of the positive electrode active material.

A positive electrode active material for a secondary battery includes a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn), and a glassy coating layer formed on surfaces of particles of the lithium composite transition metal oxide, wherein, in the lithium composite transition metal oxide, an amount of the nickel (Ni) in a total amount of transition metals is 60 mol % or more, and an amount of the manganese (Mn) is greater than an amount of the cobalt (Co), and the glassy coating layer includes a glassy compound represented by Formula 1.

Li.sub.aM.sup.1.sub.bO.sub.c  [Formula 1] wherein, M.sup.1 is at least one selected from the group consisting of boron (B), aluminum (Al), silicon (Si), titanium (Ti), and phosphorus (P), and 1≤a≤4, 1≤b≤8, and 1≤c≤20.

New formulation for pyrite scale removal from oil and gas wells and a method of pyrite scale removal are disclosed. The chemical formulation is composed of K.sub.2B.sub.4O.sub.7-4H.sub.2O, in a concentration of about 9-20 wt. % of the composition, preferably about 14 wt. % of the composition. The new formulation has the ability to dissolve pyrite without generation of the toxic H.sub.2S. Furthermore, the new formulation is cheaper and has very low corrosion rate compare to 15 wt. % HCl with corrosion inhibitor. The disclose method uses the disclosed new formulation to dissolve iron sulphide scale, performed at about 100-150 C. and about 500-2000 psi.

Carbon dioxide removal using lithium borate is generally described.

A positive electrode active material includes a core and a coating disposed on at least a portion of a surface of the core. The core includes a lithium metal oxide, a lithium metal phosphate, or a combination thereof. The coating includes a compound according to the formula Li.sub.mM.sup.1.sub.nX.sub.p, wherein M.sup.1, X, m, n and p are as defined herein. Also, an electrochemical cell including the positive electrode active material, and methods for the manufacture of the positive electrode active material and the electrochemical cell.

A positive electrode active material for a secondary battery includes a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn), and a glassy coating layer formed on surfaces of particles of the lithium composite transition metal oxide, wherein, in the lithium composite transition metal oxide, an amount of the nickel (Ni) in a total amount of transition metals is 60 mol % or more, and an amount of the manganese (Mn) is greater than an amount of the cobalt (Co), and the glassy coating layer includes a glassy compound represented by Formula 1.
Li.sub.aM.sup.1.sub.bO.sub.c[Formula 1] wherein, M.sup.1 is at least one selected from the group consisting of boron (B), aluminum (Al), silicon (Si), titanium (Ti), and phosphorus (P), and 1a4, 1b8, and 1c20.