Lithium battery is a kind of battery with lithium metal or lithium alloy as cathode material and non-aqueous electrolyte solution. Lithium ion batteries use carbon materials as the negative electrode and lithium containing compounds as the positive electrode. According to different positive electrode compounds, common lithium ion batteries include lithium cobalate, lithium manganate, lithium iron phosphate, lithium ternary, etc.

　　What are the advantages and disadvantages of batteries made of lithium cobalate, lithium manganate, lithium nickel oxide, ternary materials and lithium iron phosphate?

　　1. Lithium cobalate battery

　　Advantages: lithium cobalate has the advantages of high discharge platform, high specific capacity, good cycling performance, simple synthesis process, etc.

　　Disadvantages: Lithium cobalate material contains cobalt element with high toxicity and high price, so it is difficult to ensure the safety when making large power batteries.

　　2. Lithium iron phosphate battery

　　Advantages: lithium iron phosphate does not contain harmful elements, has low cost, excellent safety, and a cycle life of 10000 times.

　　Disadvantages: The energy density of lithium iron phosphate battery is lower than that of lithium cobalate and ternary battery.

　　3. Ternary lithium battery

　　Advantages: ternary materials can be balanced and regulated in terms of specific energy, recyclability, safety and cost.

　　Disadvantages: The worse the thermal stability of ternary materials is. For example, NCM11 material decomposes at about 300 ℃, while NCM811 decomposes at about 220 ℃.

　　4. Lithium manganate battery

　　Advantages: low cost, good safety and low temperature performance of lithium manganate.

　　Disadvantages: The lithium manganate material itself is not very stable and easy to decompose to produce gas.

　　5. Lithium nickel acid battery

　　Advantages: lithium nickel oxide has the advantages of high specific capacity, low pollution, moderate price, good matching with electrolyte, etc.

　　Disadvantages: The synthesis of lithium nickel oxide is difficult and the cycle stability is poor.

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