DataVXACS Energy LettersPaper
journal article·2017-02-10Open access

High Volumetric Energy Density Capacitors Based on New Electrode Material Lanthanum Nitride

Wei-Bin Zhang, Xue-Jing Ma, Adeline Loh, Xiaohong Li, Frank C. Walsh, Ling-Bin Kong

ACS Energy Letters· Volume 2· Issue 2
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Source abstract

Abstract

LaN is synthesized via calcining La2O3 in NH3 and studied as capacitive material for energy storage. A volumetric capacitance of 951.3 F cm–3 was found in 1 mol dm–3 Na2SO4 using a current density of 1 A g–1, with less than 1% loss of capacitance being experienced after 5000 cycles. In addition, 87.3% of the initial capacitance remained at a current density of 10 A g–1. LaN exhibits high capacitance that is attributed to subsurface space charge accumulation with a possible electric double-layer capacitor component. A reversible electrode process ensures long cycle life and favorable electrical charge transfer. The assembled LaN symmetrical capacitor showed high volumetric energy densities, facilitating high-duty applications.
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Research context

OpenAlex topics: Supercapacitor Materials and Fabrication · Advanced Sensor and Energy Harvesting Materials · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China

Renewable Energy Group, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Penryn Campus, Cornwall TR10 9FE, U.K.

Electrochemical Engineering Laboratory, Energy Technology Group, Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, U.K.

Funding

National Natural Science Foundation of China · Foundation for Innovation Groups of Basic Research in Gansu Province

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