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Title: Characterization and electrochemical activities of nanostructured transition metal nitrides as cathode materials for lithium sulfur batteries

Authors:
; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1410837
Grant/Contract Number:
DEEE0002106
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Journal of Power Sources
Additional Journal Information:
Journal Volume: 340; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-12-01 07:42:56; Journal ID: ISSN 0378-7753
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English

Citation Formats

Mosavati, Negar, Salley, Steven O., and Ng, K. Y. Simon. Characterization and electrochemical activities of nanostructured transition metal nitrides as cathode materials for lithium sulfur batteries. Netherlands: N. p., 2017. Web. doi:10.1016/j.jpowsour.2016.11.033.
Mosavati, Negar, Salley, Steven O., & Ng, K. Y. Simon. Characterization and electrochemical activities of nanostructured transition metal nitrides as cathode materials for lithium sulfur batteries. Netherlands. doi:10.1016/j.jpowsour.2016.11.033.
Mosavati, Negar, Salley, Steven O., and Ng, K. Y. Simon. Wed . "Characterization and electrochemical activities of nanostructured transition metal nitrides as cathode materials for lithium sulfur batteries". Netherlands. doi:10.1016/j.jpowsour.2016.11.033.
@article{osti_1410837,
title = {Characterization and electrochemical activities of nanostructured transition metal nitrides as cathode materials for lithium sulfur batteries},
author = {Mosavati, Negar and Salley, Steven O. and Ng, K. Y. Simon},
abstractNote = {},
doi = {10.1016/j.jpowsour.2016.11.033},
journal = {Journal of Power Sources},
number = C,
volume = 340,
place = {Netherlands},
year = {Wed Feb 01 00:00:00 EST 2017},
month = {Wed Feb 01 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.jpowsour.2016.11.033

Citation Metrics:
Cited by: 9works
Citation information provided by
Web of Science

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  • To evaluate the effect of transition metal composition on the electrochemical properties of Li-rich layer-structured cathode materials, Li{sub 1.2}Ni{sub x}Mn{sub 0.8−x}O{sub 2} (x=0.2, 0.25, 0.3, and 0.4) were synthesized, and their electrochemical properties were investigated. As nickel content x increased in Li{sub 1.2}Ni{sub x}Mn{sub 0.8−x}O{sub 2} (x=0.2, 0.25, 0.3, and 0.4), charge-discharge capacities at a low C-rate (0.05 C) decreased. The results obtained by dQ/dV curves indicate that, as the nickel content increased, the discharge capacity below 3.6 V greatly decreased, but that above 3.6 V increased. As the C-rate of the discharge process increased, the discharge reaction of Li{submore » 1.2}Ni{sub x}Mn{sub 0.8−x}O{sub 2} (x=0.2) below 3.6 V greatly decreased. In contrast, that above 3.6 V slightly decreased. This indicates that the discharge reaction above 3.6 V exhibits higher rate performance than that below 3.6 V. For the high-nickel-content cathodes, the ratio of the discharge capacity above 3.6 V to the total discharge capacity was high. Therefore, they exhibited high rate performance. - Graphical abstract: Figure shows the discharge curves of Li{sub 1.2}Ni{sub x}Mn{sub 0.8−x}O{sub 2} (x=0.2 and 0.3) within potential range of 2.5−4.6 V (vs. Li/Li{sup +}) at 0.05 and 3 C. At low C-rate (0.05 C), the discharge capacity of high-nickel-content cathode (Li{sub 1.2}Ni{sub 0.3}Mn{sub 0.5}O{sub 2}) was less than that of low-nickel-content cathode (Li{sub 1.2}Ni{sub 0.2}Mn{sub 0.6}O{sub 2}); however, the discharge potential and capacity of Li{sub 1.2}Ni{sub 0.3}Mn{sub 0.5}O{sub 2} was higher than those of Li{sub 1.2}Ni{sub 0.2}Mn{sub 0.6}O{sub 2} at high C-rate (3 C). This means that the increase in Ni/Mn ratio was effective in improving rate-performance.« less
  • Graphical abstract: Dense and spherical nanostructured V{sub 2}O{sub 5} particles. - Highlights: • One-step synthesis of dense, spherical, nanostructured V{sub 2}O{sub 5} particles was achieved. • As-prepared V{sub 2}O{sub 5} consists of primary particles of approximately 100 nm size. • The electrochemical performance of spherical nanostructured V{sub 2}O{sub 5} was investigated. • The potential range affects to the discharge capacity and cyclability of V{sub 2}O{sub 5}. - Abstract: A one-step synthesis of V{sub 2}O{sub 5} was directly achieved via ultrasonic spray pyrolysis at various synthesis temperatures ranging from 500 to 700 °C. The V{sub 2}O{sub 5} prepared at 500 °Cmore » is dense and spherical nanostructured particles, which consist of primary particles with a size of approximately 100 nm. The morphology change remarkably progresses with increasing synthesis temperatures from 500 to 700 °C. The electrochemical performance of a cathode comprising dense and spherical nanostructured V{sub 2}O{sub 5} particles prepared at 500 °C was investigated by galvanostatic discharge–charge cycling and cyclic voltammetry. From the discharge–charge cycling, the initial discharge capacity of the cathode was found to be about 403 mAh g{sup −1} in the potential range of 1.5–4.0 V, but it decreased owing to inherent phase changes with repeated cycling. The potential range significantly affects the cycle performance, and the V{sub 2}O{sub 5} cathode showed good cycle performance in the potential range of 2.5–4.0 V.« less