According to the University of Maryland Campus News Network March 31 reported that the school engineers to transform the wood structure, used to make a negative structure of lithium batteries to enhance battery safety and performance. The paper, entitled "Large Capacity, Low Curvature and Channel-Guided Lithium Batteries," was published in Proceedings of the National Academy of Sciences, March 20.
Lithium battery plays an important role in modern manufacturing industry, whether it is charging treasure, cell phone, notebook or electric car. However, this battery will rapidly expand when the battery is fully charged and shrink when the battery is depleted. Significant structural changes will lead to the battery surface lithium metal more, the long run, bringing a safety hazard such as explosions.
Scientists at the University of Maryland have proposed to abandon the traditional practice of using metal blocks to store lithium ions, instead using natural channels in the wood that transport water and nutrients to contain lithium ions. As a result, wood will become a "home" for metal ions. Due to the fixed structure, the wood will not collapse or be damaged no matter how the amount of ions changes.
To ensure that high current densities do not clog lithium ions in the "home" when charging, scientists have added access to the interior of the wood. This transformation makes the entrance of each ion is not much, the local current density is very small, the battery will not produce fever, hot phenomenon, also avoid the explosion. In addition, due to the larger internal structure of the wood, more volume can be accommodated than the metal block under the same volume conditions.
The researchers said that the current use of natural materials such as wood to improve lithium battery construction is only part of the study. It is the natural biological structure that brings inspiration to research, and one can think of new ways to create storage energy with renewable materials.
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