Nickel salts are chemical compounds that contain nickel combined with other elements, typically forming ionic compounds. They are often used in various industrial applications, including electroplating, battery production, and as catalysts in chemical reactions. Common examples of nickel salts include nickel sulfate, nickel chloride, and nickel acetate. These salts can be soluble or insoluble in water, depending on their specific chemical structure. Nickel salts are also important in the field of materials science and are studied for their properties and potential uses in electronics and renewable energy technologies. However, some nickel salts can be toxic, necessitating careful handling.