Thermo-electrochemical redox flow cycle for continuous conversion of low-grade waste heat to power.
Thermo-electrochemical redox flow cycle for continuous conversion of low-grade waste heat to power.
复制标题
低品位废热连续转化为电能的热电化学氧化还原流动循环。
DOI:
10.1038/s41598-022-11817-1
复制
发表时间:
2022-05-14
影响因子:
4.6
通讯作者:
中科院分区:
文献类型:
--
作者:
Here we assess the route to convert low grade waste heat (< 100 °C) into electricity by leveraging the temperature dependency of redox potentials, similar to the Seebeck effect in semiconductor physics. We use fluid-based redox-active species, which can be easily heated and cooled using heat exchangers. By using a first principles approach, we designed a redox flow battery system with Fe(CN)63−/Fe(CN)64− and I−/I3− chemistry. We evaluate the continuous operation with one flow cell at high temperature and one at low temperature. We show that the most sensitive parameter, the temperature coefficient of the redox reaction, can be controlled via the redox chemistry, the reaction quotient and solvent additives, and we present the highest temperature coefficient for this RFB chemistry. A power density of 0.6 W/m2 and stable operation for 2 h are achieved experimentally. We predict high (close to Carnot) heat-to-power efficiencies if challenges in the heat recuperation and Ohmic resistance are overcome, and the temperature coefficient is further increased.
登录
查看更多内容
影响因子:
3
作者:
Elgrishi, Noemie;Rountree, Kelley J.;Dempsey, Jillian L.
通讯作者:
Dempsey, Jillian L.
影响因子:
22
作者:
Gao, Caitian;Lee, Seok Woo;Yang, Yuan
通讯作者:
Yang, Yuan
影响因子:
10.8
作者:
Hu, Renchong;Cola, Baratunde A.;Baughman, Ray H.
通讯作者:
Baughman, Ray H.
影响因子:
27.8
作者:
Li, Liyu;Kim, Soowhan;Yang, Zhenguo
通讯作者:
Yang, Zhenguo
影响因子:
5.4
作者:
Luo, Xi;Cao, Xiaoxin;Huang, Xia
通讯作者:
Huang, Xia