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首页> 外文期刊>International Journal of Electrochemical Science >Adiponitrile as a Novel Electrolyte Additive for High-Voltage Lithium-Ion Batteries
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Adiponitrile as a Novel Electrolyte Additive for High-Voltage Lithium-Ion Batteries

机译：己二腈作为高压锂离子电池的新型电解质添加剂

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In his study, we reported adiponitrile (ADN) as a novel electrolyte additive for the LiNi 1/3 Co 1/3 Mn 1/3 O 2cathode electrode in voltage ranges of 3.0-4.4 V, 3.0-4.6 V and 3.0-4.8 V. The electrochemicalproperties of the electrodes were investigated by linear sweep voltammetry (LSV), a charge/dischargetest, electrochemical impedance spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS). Theresults of this study showed that adding ADN to the electrolyte could effectively enhance the reversiblecapacity and cycling performance of the cathode electrode. The initial discharge capacities were 167.8mAh g -1 and 214.8 mAh g -1 in electrolytes without and with 3% ADN, respectively. And the capacityretention rates were 68.4% and 70.4% at a voltage range of 3.0-4.6 V after 100 cycles in electrolyteswithout and with 3% ADN, respectively. The electrochemical performance was improved because ofthe compact and smooth solid electrolyte interface (SEI) film, which lowered the impedance betweenthe cathode and the electrolyte by suppressing the decomposition of LiPF 6 and improving the stabilityof EC. In addition, adding 3%ADN to the electrolyte was favourable for obtaining a lower R ct , whichcould promote the charge-transfer process by suppressing the interfacial reaction between the electrodeand electrolyte.
机译：在他的研究中，我们报道了己二腈（ADN）作为LiNi 1/3 Co 1/3 Mn 1/3 O 2阴极电极的新型电解质添加剂，电压范围为3.0-4.4 V，3.0-4.6 V和3.0-4.8 V通过线性扫描伏安法（LSV），充电/放电测试，电化学阻抗谱（EIS）和X射线光电子能谱（XPS）研究了电极的电化学性质。这项研究的结果表明，向电解液中添加ADN可以有效地增强阴极的可逆容量和循环性能。在没有和有3％ADN的电解液中，初始放电容量分别为167.8mAh g -1和214.8mAh g -1。在无ADN和含3％ADN的电解液中经过100次循环后，在3.0-4.6 V的电压范围内，容量保持率分别为68.4％和70.4％。致密而光滑的固体电解质界面（SEI）膜可改善电化学性能，可通过抑制LiPF 6的分解并提高EC的稳定性来降低阴极与电解质之间的阻抗。此外，向电解液中添加3％ADN有利于获得较低的R ct，从而可以通过抑制电极与电解液之间的界面反应来促进电荷转移过程。

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