刘国镇;林志雅;洪礼训;池毓彬;陶剑铭;林应斌;

• 1:福建师范大学物理与能源学院福建省太阳能转换与储能工程技术研究中心

摘要(Abstract)：

利用溶剂热法制备了花环状Co_3O_4材料,并通过低温水解正硅酸乙酯工艺在Co_3O_4表面沉积SiO_2纳米层.采用XRD、FTIR、SEM、EDS、BET技术对材料的结构和形貌进行表征;应用充放电测试、循环伏安法和电化学阻抗对材料的电化学性能进行细致研究.结果表明,SiO_2颗粒均匀包覆在花环状Co_3O_4表面,SiO_2包覆显著改善了Co_3O_4复合材料的循环稳定性.循环稳定性的改善主要归因于SiO_2包覆可以有效缓解锂离子嵌入脱出过程中Co_3O_4的体积膨胀,进而改善了锂离子的扩散动力学行为.

关键词(KeyWords)： 锂离子电池;Co3O4;SiO2;花环状;水解

Abstract:

Keywords:

基金项目(Foundation): 中央引导地方科技发展专项(2018L3006)

作者(Authors): 刘国镇;林志雅;洪礼训;池毓彬;陶剑铭;林应斌;

参考文献(References)：

• [1] YAN C,ZHU Y,LI Y,et al. Local built-in electric field enabled in carbon-doped Co3O4nanocrystals for superior lithium-ion storage[J]. Advanced Functional Materials,2018,28(7):1-8.
• [2] CAO K,JIN T,YANG L,et al. Recent progress in conversion reaction metal oxide anodes for Li-ion batteries[J]. Mate-rials Chemistry Frontiers,2017,1(11):2213-2242.
• [3] LONGONI G,FIORE M,KIM J H,et al. Co3O4negative electrode material for rechargeable sodium ion batteries:an in-vestigation of conversion reaction mechanism and morphology-performances correlations[J]. Journal of Power Sources,2016,332:42-50.
• [4] ZHAN L,WANG S,DING L X,et al. Grass-like Co3O4nanowire arrays anode with high rate capability and excellent cyc-ling stability for lithium-ion batteries[J]. Electrochimica Acta,2014,135:35-41.
• [5] SHI Y,PAN X,LI B,et al. Co3O4and its composites for high-performance Li-ion batteries[J]. Chemical EngineeringJournal,2018,343:427-446.
• [6] LI H H,ZHOU L,ZHANG L L,et al. Co3O4nanospheres embedded in a nitrogen-doped carbon framework:an electrodewith fast surface-controlled redox kinetics for lithium storage[J]. ACS Energy Letters,2017,2(1):52-59.
• [7] LI Z,YU X Y,PAIK U. Facile preparation of porous Co3O4nanosheets for high-performance lithium ion batteries and oxy-gen evolution reaction[J]. Journal of Power Sources,2016,310:41-46.
• [8] DOU Y,XU J,RUAN B,et al. Atomic layer-by-layer Co3O4/graphene composite for high performance lithium-ion batter-ies[J]. Advanced Energy Materials,2016,6(8):1-8.
• [9] SUN Y,HUANG F,LI S,et al. Novel porous starfish-like Co3O4@nitrogen-doped carbon as an advanced anode for lithi-um-ion batteries[J]. Nano Research,2017,10(10):3457-3467.
• [10] LEE C S. Modeling and characterization of gas-phase etching of thermal oxide and TEOS oxide using anhydrous HF andCH3OH[J]. Journal of the Electrochemical Society,1996,143(3):1099-1103.
• [11] OMANDA H,BROUSSE T,MARHIC C,et al. Improvement of the thermal stability of Li Ni0. 8Co0. 2O2cathode by a Si Oxprotective coating[J]. Journal of the Electrochemical Society,2004,151(6):A922-A929.
• [12] YIM T,HA H J,PARK M S,et al. A facile method for construction of a functionalized multi-layered separator to enhancecycle performance of lithium manganese oxide[J]. RSC Advances,2013,3(48):25657-25661.
• [13] LEE D J,LEE K S,MYUNG S T,et al. Improvement of electrochemical properties of Li1. 1Al0. 05Mn1. 85O4achieved by anAl F3coating[J]. Journal of Power Sources,2011,196(3):1353-1357.
• [14] GHASEMZADEH M A,AZIMI-NASRABAD M,HASAN-NASROLLAHI S M,et al. Co3O4@Si O2nanocomposite as apowerful and reusable catalyst for the synthesis of 13-Aryl-indeno[1,2-b] naphtha[1,2-e] pyran-12(13H)-ones[J]. Iranian Journal of Science and Technology,Transactions A:Science,2018,42(3):1199-1207.
• [15] ZHAO Y,LI Y,MA C,et al. Micro-/nano-structured hybrid of exfoliated graphite and Co3O4nanoparticles as high-per-formance anode material for Li-ion batteries[J]. Electrochimica Acta,2016,213:98-106.
• [16] LIU T,ZHANG L,YOU W,et al. Core-shell nitrogen-doped carbon hollow spheres/Co3O4nanosheets as advanced elec-trode for high-performance supercapacitor[J]. Small,2018,14(12):1702407.
• [17] SMITH A B,CONDON S M,MCCAULEY J A,et al. A unified total synthesis of the immunomodulators(-)-rapamycinand(-)-27-demethoxyrapamycin:assembly of the common C(1-20)perimeter and final elaboration[J]. Journal of theAmerican Chemical Society,1997,119(5):962-973.
• [18] DEBENHAM J S,RODEBAUGH R,FRASER-REID B. TCP-and phthalimide-protected n-pentenyl glucosaminide precur-sors for the synthesis of nodulation factors as illustrated by the total synthesis of nodRf-Ⅲ(C18∶1,Me Fuc)[J]. The Jour-nal of Organic Chemistry,1997,62(14):4591-4600.
• [19] SCHEIDT K A,CHEN H,FOLLOWS B C,et al. Tris(dimethylamino)sulfonium difluorotrimethylsilicate,a mild rea-gent for the removal of silicon protecting groups[J]. The Journal of Organic Chemistry,1998,63(19):6436-6437.
• [20] XIAO Y,HU C,CAO M. High lithium storage capacity and rate capability achieved by mesoporous Co3O4hierarchicalnanobundles[J]. Journal of Power Sources,2014,247:49-56.
• [21] GENG H,ANG H,DING X,et al. Metal coordination polymer derived mesoporous Co3O4nanorods with uniform Ti O2coating as advanced anodes for lithium ion batteries[J]. Nanoscale,2016,8(5):2967-2973.
• [22] FANG D,LI L,XU W,et al. Self-assembled hairy ball-like Co3O4nanostructures for lithium ion batteries[J]. Journalof Materials Chemistry A,2013,1(42):13203-13208.
• [23] CHO W,KIM S M,SONG J H,et al. Improved electrochemical and thermal properties of nickel rich Li Ni0. 6Co0. 2Mn0. 2O2cathode materials by Si O2coating[J]. Journal of Power Sources,2015,282:45-50.
• [24] LI Y Da,ZHAO S X,NAN C W,et al. Electrochemical performance of Si O2-coated Li Fe PO4cathode materials for lithiumion battery[J]. Journal of Alloys and Compounds,2011,509(3):957-960.
• [25] LIN Z,ZHU W,WANG Z,et al. Synthesis of carbon-coated Li4Ti5O12nanosheets as anode materials for high-performancelithium-ion batteries[J]. Journal of Alloys and Compounds,2016,687:232-239.