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High volumetric energy density capacitors based on new electrode material lanthanum nitride

High volumetric energy density capacitors based on new electrode material lanthanum nitride
High volumetric energy density capacitors based on new electrode material lanthanum nitride
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.
336-341
Zhang, Wei-Bin
dd2c8bcb-29e1-46d4-b5d7-469ed92a65b2
Ma, Xue-Jing
600c7ddd-b857-44f0-92c1-24a8b424d839
Loh, Adeline
2459382b-7103-417e-b2ed-84a2e5483fd4
Li, Xiaohong
9c4a40b0-c567-476b-b698-ae51b3f13dbd
Walsh, Frank
309528e7-062e-439b-af40-9309bc91efb2
Kong, Lin-Bin
ce09f56e-6d4f-4445-af2d-61e5637d7a8e
Zhang, Wei-Bin
dd2c8bcb-29e1-46d4-b5d7-469ed92a65b2
Ma, Xue-Jing
600c7ddd-b857-44f0-92c1-24a8b424d839
Loh, Adeline
2459382b-7103-417e-b2ed-84a2e5483fd4
Li, Xiaohong
9c4a40b0-c567-476b-b698-ae51b3f13dbd
Walsh, Frank
309528e7-062e-439b-af40-9309bc91efb2
Kong, Lin-Bin
ce09f56e-6d4f-4445-af2d-61e5637d7a8e

Zhang, Wei-Bin, Ma, Xue-Jing, Loh, Adeline, Li, Xiaohong, Walsh, Frank and Kong, Lin-Bin (2017) High volumetric energy density capacitors based on new electrode material lanthanum nitride. ACS Energy Letters, 336-341. (doi:10.1021/acsenergylett.6b00636).

Record type: Letter

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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More information

Accepted/In Press date: 9 January 2017
e-pub ahead of print date: 9 January 2017
Published date: 10 February 2017
Additional Information: Authors' manuscript unobtainable form main author.

Identifiers

Local EPrints ID: 415090
URI: http://eprints.soton.ac.uk/id/eprint/415090
PURE UUID: e12dd45a-0e31-4dad-997e-b02d1af5f78c

Catalogue record

Date deposited: 25 Oct 2017 16:30
Last modified: 06 Oct 2020 16:40

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