TritonX-100辅助溶剂热法合成锂电池负极材料花型SnS_2及其电化学性能  

Synthesis and Electrochemical Properties of Flower-like SnS_2 by Triton X-100 Assisted Hydrothermal Method as Negative Electrode Material for Lithium Ion Batteries

作　　者：张娟 陈秀娟[2] 张鹏林 

机构地区：[1]省部共建有色金属先进加工与再利用国家重点实验室,兰州730050 [2]兰州理工大学机电工程学院,兰州730050

出　　处：《材料研究学报》2016年第1期63-67,共5页Chinese Journal of Materials Research

基　　金：国家自然科学基金51161012资助项目~~

摘　　要：采用表面活性剂Triton X-100辅助溶剂热法合成花型纳米Sn S2,研究了表面活性剂添加量(0-2 m L)对样品的成分、形貌及电化学性能的影响。X射线衍射光谱(XRD)和能谱(EDS)的测试结果表明:合成的材料为单相Sn S2,具有层状六方Cd I2型晶体结构;扫描电镜(SEM)观察结果表明,Triton X-100在控制花型Sn S2形貌的过程中起了决定性作用,当Triton X-100的添加量为0.5 m L时样品的结晶度最好,花型结构饱满,形貌最佳;电化学性能测试结果表明:Triton X-100添加量为0.5 m L时,在0.01-1.2 V电压范围及0.15C倍率下花型纳米Sn S2的首次放电比容量可达1598 m Ah·g-1,首次可逆比容量为656 m Ah·g-1,循环50次后可逆比容量为572 m Ah·g-1,容量保持率达到87.2%。Flower-like nanostructured Sn S2 was synthesized by polyethylene glycol octylphenol ether（Triton X-100）-assisted hydrothermal method, the effect of the amount of surfactant Triton X-100 on the ingredient, morphology and electrochemical properties of the synthesized product was studied. Results show that the product is single- phase Sn S2 with crystal structure of hexagonal Cd I2. The Triton X- 100 plays a dominative role in controlling the morphology of Sn S2. With a dosage of 0.5 m L Triton X-100 the synthesized Sn S2 possesses the highest degree of crystallinity with a fully flower-like morphology. A rechargeable Li-ion batteries with the as-prepared flowerlike nanostructured Sn S2 as anode exhibits excellent electrochemical performance with high initial discharge specific capacity 1598 m Ah·g- 1and reversible capacity 656 m Ah·g- 1respectively, in a voltage range of 0.01-1.2 V and a rate of 0.15 C. After 50 cycles with a rate of 0.15 C, the specific capacities retain 572 m Ah·g-1and capacity retention rate can reach87.2%.

关 键 词：材料合成与加工工艺 TRITON X-100 溶剂热法 花型纳米Sn S2 电化学性能 

分 类 号：TB321[一般工业技术—材料科学与工程] TM910[电气工程—电力电子与电力传动]