Lithium batteries are widely used in mobile devices such as mobile phones and laptops, and hazardous events such as ignition of mobile devices due to battery short-circuits are also on the rise. A new study was jointly conducted by scientists from China and the United States, Nano-level diamond particles added to the electrolyte to prevent the battery generated within the resulting short-circuit deposits, to avoid short-circuit caused by a battery of fire accidents.
Lithium batteries have high energy density and good discharge performance, and are widely used in industrial and consumer electronics applications. However, when pure lithium is used as an electrode, dendritic deposits called "dendrites" are easily generated inside the battery to a large extent Will cause a short circuit, while most lithium batteries using lithium intercalation graphite material as an electrode, although to some extent reduce the occurrence of dendrites, but also greatly reduce the energy storage effect of lithium batteries (lithium metal only as a Electrode lithium battery tenth).
The researchers added nanoscale diamonds to lithium battery electrolytes this time. They found that the deposits generated inside the cells are smooth and not "dendritic." This new discovery is expected to suppress the use of pure lithium metal as the electrode ' Dendrite 'occurs, so that lithium batteries can play better safety and efficiency.
It is understood that nano-diamonds are very small diamond particles, the size of hair is less than one ten thousandth of the diameter, and their manufacturing costs are very low, and has a very regular structure, easy to naturally arrange to become a smooth surface. In the experiment, lithium batteries with nano-scale diamonds were added for 200 hours of charge-discharge cycle test. The test results show that the technology should be adequate for some industrial applications. Unfortunately, it is used in smartphones or laptops. Need to further verify performance.
The current study is published in the new issue of Nature Communications, a study co-authored by institutions such as Tsinghua University in China and Drexel University in the United States.
