The energy density of the three-yuan lithium battery is close to the limit When the solid-state battery will take on the heavy responsibility

At present, the development of pure electric vehicles has been affected by the low energy density of batteries. Battery energy density without a major breakthrough, the range of pure electric vehicles can not be greatly increased, the development of pure electric vehicles will rely on intelligent policy support, lack of market power.
, the Ningbo Institute of Materials Technology and Engineering of the Chinese Academy of Sciences announced that the nano-pilot special "all-solid battery" project, which it led, had passed the acceptance of . This technological advance will promote the large-scale application of all-solid-state lithium batteries in China.
industry said that the current unit energy density of the three-yuan lithium battery is close to the limit, it is difficult to have a big breakthrough. To further increase the energy density of the three-way lithium battery, the proportion of nickel in the battery needs to be further increased. However, after the proportion of nickel in the battery increased, due to the thermal stability of high nickel is very poor, the thermal reaction inside the battery will be very intense, safety concerns.
rely on the three-yuan battery technology route, power battery energy density to achieve the goal of 350Wh/kg, very difficult. So the industry wants to rely on solid-state batteries to further increase battery energy density. A solid-state battery is a battery that uses solid electrodes and solid electrolytes. Its solid electrolyte is non-flammable, non-corrosive, non-volatile, non-leaking, good performance at high temperature, higher safety. Solid-state batteries greatly reduce the probability of self-ignition of electric vehicles.
more and more domestic and foreign enterprises and research institutions will focus on all-solid lithium batteries. Volkswagen has announced plans to develop a 1000km solid-state battery; Toyota expects to complete the development of solid-state batteries by 2022 and to achieve mass production by 2030.
electrolyte materials are the core of all-solid-state lithium battery technology, and the research of solid-state electrolytes is mainly focused on three main types of materials: polymers, oxides and sulphides. Polymer high temperature performance is good, there have been commercial application cases; The oxide circulation performance is good, and it is suitable for the flexible structure of thin moon mo. The highest conductivity of sulphides is the main direction of the future.
, solid-state batteries still face some technical challenges. Solid-state electrolytes have high resistance and have technical challenges in conductivity, battery multiply, battery preparation efficiency, and cost control. In May, Toyota said it expected to build solid-state batteries after 2020, but that it would have to wait until after 2030 to produce solid-state batteries.
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