工程师们已经找到了一种方法来处理塑料垃圾填埋场,同时改进电池——将浸泡在含硫溶剂中的无墨塑料放入微波炉中,and then into batteries as a carbon scaffold
188betsport

普渡大学的工程师们已经找到了一种方法来处理塑料垃圾填埋场,同时改进电池——将浸泡在含硫溶剂中的无墨塑料放入微波炉中,然后作为碳支架投入电池。

Lithium-sulfur batteries have been hailed as the next generation of batteries to replace the current lithium ion variety.Lithium-sulfur batteries are cheaper and more energy-dense than lithium ions,从电动汽车到笔记本电脑,这些都是重要的特点。

Usable for about 100 charging cycles


但是,锂硫电池到了这一点,其寿命并不长,being usable for about 100 charging cycles.

Purdue researchers have found a way to increase the lifespan in a process that has the added bonus of being a convenient way to recycle plastic.他们的过程,which was recently published in ‘ACS Applied Materials and Interfaces',说明在微波炉中放入浸泡硫磺的塑料,包括透明塑料袋,将该材料转化为理想的物质,以将即将使用的电池寿命提高到200多个充电放电周期。

“No matter how many times you recycle plastic,that plastic stays on the earth,“said Vilas Pol,associate professor in Purdue's School of 188betsportChemical Engineering.“我们一直在想办法摆脱它,这是一种至少增加价值的方法。”“

The need to reduce landfills runs parallel to making lithium-sulfur batteries good enough for commercial use.

Lithium-sulfur batteries getting more popular


“Because lithium-sulfur batteries are getting more popular,我们想从中吸取更长的生命,“Pol说。

Low-density polyethylene plastic,which is used for packaging and comprises a big portion of plastic waste,helps address a long-standing issue with lithium-sulfur batteries – a phenomenon called the polysulfide shuttling effect that limits how long a battery can last between charges.

Lithium-sulfur batteries,顾名思义,有锂和硫。当施加电流时,锂离子迁移到硫中,发生化学反应生成硫化锂。188betsportThe byproduct of this reaction,多硫化物,倾向于穿过锂侧,防止锂离子向硫迁移。This decreases the charge capacity of a battery as well as lifespan.

“The easiest way to block polysulfide is to place a physical barrier between lithium and sulfur,“said Patrick Kim,a Purdue postdoc research associate in 188betsportchemical engineering.

Previous studies had attempted making this barrier out of biomass,比如香蕉皮和开心果壳,由于生物质衍生碳中的孔具有捕获多硫化物的潜力。

生物质能很好地保存并可用于其他用途。


“每种材料都有自己的好处,但是生物量很好保存,可以用于其他用途,“Pol说。“Waste plastic is really valueless and burdensome material."“

相反,researchers thought of how plastic might be incorporated into a carbon scaffold to suppress polysulfide shuttling in a battery.过去的研究表明,低密度聚乙烯塑料与磺化基团结合时产生碳。

研究人员将一个塑料袋浸泡在含硫溶剂中,然后放在微波炉中,以廉价的方式快速提高转化成低密度聚乙烯所需的温度。The heat promoted the sulfonation and carbonisation of the plastic and induced a higher density of pores for catching polysulfide.The low-density polyethylene plastic could then be made into a carbon scaffold to divide the lithium and sulfur halves of a battery coin cell.

“从该方法得到的塑料衍生碳包括带负电荷的磺酸盐基,这也是多硫化物的特性,“Kim said.磺化低密度聚乙烯制成碳支架,因此,suppressed polysulfide by having a similar 188betsportchemical structure.

“这是提高电池容量保持率的第一步,“Pol说。“The next step is fabricating a bigger-sized battery utilising this concept."“

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//www.bjgzb.com/wp-content/uploads/2018/05/a-bat1.jpg//www.bjgzb.com/wp-content/uploads/2018/05/a-bat1-300x300.jpgDavid O'Riordan188betsport电池,188betsportchemical,塑料
普渡大学的工程师们已经找到了一种方法来处理塑料垃圾填埋场,同时改进电池——将浸泡在含硫溶剂中的无墨塑料放入微波炉中,锂硫电池被誉为下一代替代电流的电池。