02625nas a2200289   4500008004100000022001400041245011700055210006900172260000900241300001100250490000800261520167800269653001901947653003701966653003302003653001702036100001702053700001702070700001902087700001502106700001902121700001502140700001902155700001302174700001902187856012902206       2024                        eng d  a0925-838800aEfficient electrochemical synthesis of Cu 3 Si/Si hybrids as negative electrode material for lithium-ion battery0 aEfficient electrochemical synthesis of Cu 3 SiSi hybrids as nega  cSEP   a1749960 v9983 a<p>
	Nanoscaling and alloying techniques for silicon -based materials are widely recognized as vital technological approaches to effectively address the challenges associated with volume expansion and poor conductivity in silicon anodes. Developing short process, cost-effective preparation methods and shape controllable silicon -based materials is expected to improve their cyclability. Herein, utilizing the superior electrical conductivity of copper metal and its stable alloy interaction with silicon, the present study introduced a simple synthetic process by incorporating nanoscale Cu 2 O into a SiO 2 dioxide matrix under a combination of hydrothermal reaction with Cu (NO 3 ) 2 as the copper source and further sintering treatment. Under the conditions of a Cu:Si molar ratio to 3:8 under 850 degrees C by 2.6 V of constant electrolsyis for 3 h, straight silicon nanowires with a cross-sectional distribution were obtained. The Cu 3 Si alloy particles were enriched around silicon nanowires. Experimental testing was conducted to evaluate the electrochemical storage capabilities of Cu 3 Si/Si nanowires, resulting in an initial specific capacity of 2630.7 mAh g -1 and an initial coulombic efficiency of 88.94%. After 100 charge -discharge cycles, the discharge specific capacity reached 1675.4 mAh g -1 , with a capacity retention rate of 66.20%. This work demonstrates the effectiveness of constructing a Cu 3 Si conductive network for solving the volume expansion and conductivity problems of Si and the distinctive Cu 3 Si/Si architecture offers an exemplary model for the design of silicon -based composite anodes for advanced lithium -ion batteries.</p>
10aCu3Si/Si alloy10aElectrochemical storage capacity10aMolten salt electrochemistry10aSi nanowires1 aJiang, Siwei1 aCheng, Jiaxu1 aNayaka, G., P.1 aDong, Peng1 aZhang, Yingjie1 aXing, Yubo1 aZhang, Xiaolei1 aDu, Ning1 aZhou, Zhongren  uhttps://library.ncl.res.in/content/efficient-electrochemical-synthesis-cu-3-sisi-hybrids-negative-electrode-material-lithium