World’s longest fibre battery powers LiFi system
美国麻省理工学院的研究人员已经开发出一种rechargeable lithium-ion battery in the form of an fibre that could be woven into fabrics.
As a proof of concept the team produced the world’s longest fibre battery at 140 meters long with a process that could produce a battery as long as 1km. The 140m fibre has an energy storage capacity of 123 mAh to charge smartwatches or phones and is only a few hundred microns in diameter, making it suitable for weaving into materials for wearable systems.
纤维电池是使用新的电解质凝胶和标准纤维绘制系统制造的，该系统从包含所有组件的较大圆柱体开始，然后将其加热到熔点以下。该材料通过狭窄的开口绘制，以将所有零件压缩到其原始直径的一小部分，同时保持所有原始零件排列。
This embeds the lithium and other materials inside the fibre, with a protective outside coating, thus directly making this version stable and waterproof. “There’s no obvious upper limit to the length. We could definitely do a kilometre-scale length,” says researcher Tural Khudiyev, who is now an assistant professor at National University of Singapore.
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“This is the first 3D printing of a fibre battery device,” said Khudiyev. “After printing, you do not need to add anything else, because everything is already inside the fibre, all the metals, all the active materials. It’s just a one-step printing. That’s a first.”
“When we embed the active materials inside the fibrer, that means sensitive battery components already have a good sealing and all the active materials are very well-integrated, so they don’t change their position,” he said. The aspect ratio is up to a million, making it practical to use standard weaving equipment to create fabrics that incorporate the batteries as well as electronic systems.
演示设备使用纤维电池在基于LIFI的灯光通信系统中为LED和接收器供电。该团队还将多个LED嵌入到纤维中。
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