In the last decade,liquid fuel cells with their numerous advantages have gained widespread attention across the globe.However,it is a prerequisite for the fuel cells to attain an all-climate operation ability before r...In the last decade,liquid fuel cells with their numerous advantages have gained widespread attention across the globe.However,it is a prerequisite for the fuel cells to attain an all-climate operation ability before realizing broad and extensive applications.To date,conventional liquid fuel cells always require pre-heating strategy or auxiliary heating equipment before they can operate in sub-zero environments,which makes the system bulky and prolongs its response time.The recently proposed and demonstrated novel electrically rechargeable liquid fuel(e-fuel),is considered to be a potential solution for powering fuel cells in various environments,particularly under sub-zero conditions.Using the e-fuel,a passive liquid fuel cell is designed,fabricated,and examined from 23 to–20°C.The cold-start free fuel cell is demonstrated to attain a peak power density of 110.34 mW·cm−2 at−20°C.Furthermore,to demonstrate its capability for commercial application,a two-cell stack has been developed to power a toy train,which not only demonstrates the superior scalability of this system,but also presents it as a feasible device for power generation in extreme environments.展开更多
Lately,utilizing a novel electrically rechargeable liquid fuel(e-fuel),a fuel cell has been designed and fabricated,which is demonstrated to achieve a much better performance than alcoholic liquid fuel cells do.Howeve...Lately,utilizing a novel electrically rechargeable liquid fuel(e-fuel),a fuel cell has been designed and fabricated,which is demonstrated to achieve a much better performance than alcoholic liquid fuel cells do.However,its current performance,which thus hampers its wide application,demands further improvement to meet up with industrial requirement.Therefore,to attain a better performance for this system,an in-depth understanding of the complex physical and chemical processes within this fuel cell is essential.To this end,in this work,a two-dimensional transient model has been developed to gain an extensive knowledge of a passive e-fuel cell and analyze the major factors limiting its performance.The effects of various structural parameters and operating conditions are studied to identify the underlying performance-limiting factors,where deficient mass transport is found to be one of the major causes.The increment of anode porosity and thickness are found to be effective methods of improving the cell performance.This study therefore provides insights on achieving further per-formance advancement of the fuel cell in the future.展开更多
基金Open access funding provided by The Hong Kong Polytechnic University.
文摘In the last decade,liquid fuel cells with their numerous advantages have gained widespread attention across the globe.However,it is a prerequisite for the fuel cells to attain an all-climate operation ability before realizing broad and extensive applications.To date,conventional liquid fuel cells always require pre-heating strategy or auxiliary heating equipment before they can operate in sub-zero environments,which makes the system bulky and prolongs its response time.The recently proposed and demonstrated novel electrically rechargeable liquid fuel(e-fuel),is considered to be a potential solution for powering fuel cells in various environments,particularly under sub-zero conditions.Using the e-fuel,a passive liquid fuel cell is designed,fabricated,and examined from 23 to–20°C.The cold-start free fuel cell is demonstrated to attain a peak power density of 110.34 mW·cm−2 at−20°C.Furthermore,to demonstrate its capability for commercial application,a two-cell stack has been developed to power a toy train,which not only demonstrates the superior scalability of this system,but also presents it as a feasible device for power generation in extreme environments.
基金The work described in this paper was supported by a grant from the Research Grant Council of the Hong Kong Special Administrative Re-gion,China(Project No.T23–601/17-R)a grant from the Research Institute for Smart Energy(RISE)at The Hong Kong Polytechnic Uni-versity(Q-CDA4).
文摘Lately,utilizing a novel electrically rechargeable liquid fuel(e-fuel),a fuel cell has been designed and fabricated,which is demonstrated to achieve a much better performance than alcoholic liquid fuel cells do.However,its current performance,which thus hampers its wide application,demands further improvement to meet up with industrial requirement.Therefore,to attain a better performance for this system,an in-depth understanding of the complex physical and chemical processes within this fuel cell is essential.To this end,in this work,a two-dimensional transient model has been developed to gain an extensive knowledge of a passive e-fuel cell and analyze the major factors limiting its performance.The effects of various structural parameters and operating conditions are studied to identify the underlying performance-limiting factors,where deficient mass transport is found to be one of the major causes.The increment of anode porosity and thickness are found to be effective methods of improving the cell performance.This study therefore provides insights on achieving further per-formance advancement of the fuel cell in the future.
