Promising electrochemical study of titanate based anodes in direct carbon fuel cell using walnut and almond shells biochar fuel

JOURNAL OF POWER SOURCES

卷:434

Article

Ali, Amjad^1,2  Raza, Rizwan^1,3  Shakir, Muhammad Imran^4,5  Iftikhar, Asia¹  Alvi, Farah¹  Ullah, Muhammad Kaleem¹  Hamid, Abdul⁶  Kim, Jung-Sik⁷ 

[1] COMSATS Univ Islamabad, Dept Phys, CERL, Lahore Campus, Lahore 54000, Pakistan

[2] Univ Okara, Dept Phys, Okara, Punjab, Pakistan

[3] Linkoping Univ, Dept Phys Chem & Biol, SE-58183 Linkoping, Sweden

[4] King Saud Univ, Sustainable Energy Technol Ctr, Riyadh, Saudi Arabia

[5] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA

[6] Univ Okara, Dept Chem, Okara, Punjab, Pakistan

[7] Loughborough Univ, Dept Aeronaut & Automot Engn, Loughborough LE11 3TU, Leics, England

关键词: Perovskite;    Walnut shells;    Almond shells;    Electronic conductivity;    Power density;   

DOI  :  10.1016/j.jpowsour.2019.05.085

来源: Elsevier

【 摘 要 】

The direct carbon fuel cell (DCFC) is an efficient device that converts the carbon fuel directly into electricity with 100% theoretical efficiency contrary to practical efficiency around 60%. In this paper four perovskite anode materials La0.4Sr0.6M0.09Ti0.91O3-delta (M = Ni, Fe, Co, Zn) have been prepared using sol-gel technique to measure the performance of the device using solid fuel. These materials have shown reasonable stability and conductivity at 700 degrees C. Further structural analysis of as-prepared anode material using XRD technique reveals a single cubic perovskite structure with average crystallite size roughly 47 nm. Walnut and almond shells biochar have also been examined as a fuel in DCFC at the temperature range 400-700 degrees C. In addition, Elemental analysis of walnut and almond shells has shown high carbon content and low nitrogen and sulfur contents in the obtained biochar. Subsequently, the superior stability of as-prepared anode materials is evident by thermogravimetric analysis in pure N-2 gas atmosphere. Conversely, the LSFT anode has shown the highest electronic conductivity of 7.53Scm(-1) at 700 degrees C. The obtained power density for LSFTO3-delta composite anode mixed in sub-bituminous coal, walnut and almond shells biochar is of 68, 55, 48 mWcm(-2) respectively. A significant improvement in performance of DCFC (78 mWcm(-2)) was achieved.

【 授权许可】

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