2016 Fiscal Year Research-status Report
Enhanced energy harvesting by reverse electrodialysis in aligned mesoporous silica SBA-15 thin films
| Project/Area Number |
16K18024
|
|---|
| Research Institution | The University of Tokyo |
|---|
Principal Investigator |
黄 ジュンホ 東京大学, 大学院工学系研究科(工学部), 特任研究員 (60772978)
|
|---|
| Project Period (FY) |
2016-04-01 – 2018-03-31
|
| Keywords | Ion-selective transport / Nanofluidics / Mesoporous silica / Energy harvesting / Salinity gradient / Osmotic energy / Reverse electrodialysis |
|---|
| Outline of Annual Research Achievements |
A mesoporous silica (MPS)-based nanofluidic energy harvester was fabricated and ion-selective transport in mesopores as a function of the salt gradient was studied. Aqueous solutions with three different kinds of monovalent electrolytes, KCl, NaCl and LiCl with different diffusion coefficients were considered as working fluids. The dependency of power density on the type of cation employed indicates the harvested energy increases as the cation mobility increases, particularly at high salt concentrations. This cation-specific dependency suggests the maximum power denstiy increases by increasing the diffusion coefficient ratio of cations to anions, making this ratio a critical parameter in enhancing the performance of nanofluidic energy harvester with small pores ranging from 2 to 3 nm.
|
| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
So far, the research is proceeding as planned as a research representative has already a wealth of experience in various experiments relating a fabrication of various nanoporous materials, thin film, photolithography (MEMS) and characterization techniques of produced porous materials such as a scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray reflection. These abundant experimental background experiences is a great help in conducting the project.
|
| Strategy for Future Research Activity |
I am going to investigate a temperature sensitivity on the energy harvesting characteristic of a osmotic energy conversion systems. An ionic conductance in a silica nanopore increases with increasing temperature because ion mobility and surface charge density of nanopore increase. Therefore, the energy harvesting performance of the device will be studied at various salt concentration gradients and temperature conditions. In order to conduct the research on the temperature sensitivity, a temperature-controllable experiment apparatus should be designed and prepared soon.
|
| Causes of Carryover |
課題期間が2年でまだ1年の課題期間が残っています。特にその他部分での次年度使用額がたくさん生じた一つの原因としては前年度に研究に必要な備品をあらかじめ購入をしておいたからです。
|
| Expenditure Plan for Carryover Budget |
国内と国際学会に参加予定（旅費）
実験に必要な物品費とその他購入に使う予定
|
