Scientists are expediting development of high performance paper batteries using main ingredients of wood.
Many countries are expediting development of eco-friendly energies. Among them, development of lithium ion batteries using nanocellulose attracts attention.
Lithium ion batteries made of nanocellulose are cheaper and more eco-friendly compared to those made of other materials, such as polyolefine separation membrane, cathode collector and anode collector. Nanocellulose is lighter, more flexible and higher in strength than other materials.
In line with this trend, the Korea Forest Research Institute (KFRI) has been developing rechargeable lithium batteries using nanocellulose since 2009. And it hosted a seminar on August 6 under the topic of ‘Latest trend and outlook of R&D of rechargeable lithium batteries’ as part of its effort to achieve the Forest Science 3.0 initiative. Prof. Lee Sang-yeong of energy engineering for environment at Ulsan National Institute of Science and Technology (UNIST) presented a paper at the seminar.
At the seminar, attendees discussed progresses in R&D of core materials for rechargeable lithium batteries, which is one of areas that apply nanocellulose, as well as outlook of separation membranes, anode collectors, cathode collectors and paper batteries.
In his paper presented at the seminar, Prof. Lee Sang-yeong (picture) said that it will be possible to develop materials that can reduce weight of numerous electronic devices if paper batteries are successfully developed using nanocellulose-based separation membrane, anode collector and cathode collector. Particularly, Prof. Lee Sang-yeong stressed that original technology is important since scientists across the world are fiercely competing to develop energy storage devices, such as lithium ion batteries.
Another scientist presented a paper that it is possible to develop eco-friendly and flexible paper electrode by using water-based nanocellulose binder instead of polymer resin, which is the existing electrode binder. And in a paper, other scientist said that expansion in volume of anode and cathode active materials in rechargeable lithium batteries can be relieved when they are charged and discharged if nanocellulose supports are adopted to improve mechanical properties of the electrode.
Dr. Lee Seon-yeong at KFRI said, “In conjunction with research team led by Prof. Lee Sang-yeong at UNIST, the KFRI has been developing separation membrane and anode collector for rechargeable lithium batteries using nanocellulose since 2010. We aim at developing a high performance and large output paper battery using world’s first core materials in 2 years by developing anode collector by 2014.”
Meanwhile, scientists in many countries, including Sweden and the United States, developed paper batteries using cellulose paper and printing paper, but they are still in primitive stage.
Source : ecojournal