کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7724772 | 1497833 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Self-oxidized sponge-like nanoporous nickel alloy in three-dimensions with pseudocapacitive behavior and excellent capacitive performance
ترجمه فارسی عنوان
آلیاژ نیکل نانوپور مانند اکسید کننده خودبهخود در سه بعد با رفتار پسیو کپتیکی و عملکرد خازنی عالی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
Recent studies clarify that NiO is actually a battery material, rather than the widely considered pseudocapacitive material. Self-oxidized sponge-like nanoporous Ni-Co alloy (ss-npNi) in three-dimensions (3D) is fabricated by dealloying Mg80Ni19.2Co0.8 metallic glass ribbon in citric acid and naturally surface self-oxidizing in air. The ss-npNi is found to be a battery material in nature while exhibiting pseudocapacitive behavior. The redox reactions at the peaks are controlled by surface processes with fast charge-transfer, and the pseudocapacitive contribution of the redox current is dominant throughout the whole potential range. The pseudocapacitive behavior originates from the fast charge/discharge processes occurring on the ultrathin metal oxide surface of the three-dimensional conductive ligaments. The ss-npNi exhibits high specific capacitance of 1424â¯Fâ¯g-1â¯at a current density of 1â¯Aâ¯gâ1, enhanced rate capability with â¼82.4% retention at a high current density of 40â¯Aâ¯gâ1 and excellent cycle stability with â¼95.7% retention even after 10000 continuous charge-discharge cycles at 40â¯Aâ¯gâ1. This work renders the dealloying method a promising way of endowing battery materials with pseudocapacitive behavior.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 399, 30 September 2018, Pages 192-198
Journal: Journal of Power Sources - Volume 399, 30 September 2018, Pages 192-198
نویسندگان
Hongjie Xu, Shujie Pang, Tao Zhang,