abstract |
Batteries are disclosed. In some embodiments, a battery has a cathode that includes Cu x M y O z X t , where M is a metal, X includes one or more halides and/or nitrate, x+y is from about 6.8 to about 7.2, and z and t are selected so that the copper in Cu x M y O z X t has a formal oxidation state of +2 or greater. |