title: A flexible ligand-based wavy layered metal-organic framework for lithium-ion storage.
abstract: A substantial challenge for direct utilization of metal-organic frameworks (MOFs) as lithium-ion battery anodes is to maintain the rigid MOF structure during lithiation/delithiation cycles. In this work, we developed a flexible, wavy layered nickel-based MOF (C20H24Cl2N8Ni, designated as Ni-Me4bpz) by a solvothermal approach of 3,3',5,5'-tetramethyl-4,4'-bipyrazole (H2Me4bpz) with nickel(II) chloride hexahydrate. The obtained MOF materials (Ni-Me4bpz) with metal azolate coordination mode provide 2-dimensional layered structure for Li(+) intercalation/extraction, and the H2Me4bpz ligands allow for flexible rotation feature and structural stability. Lithium-ion battery anodes made of the Ni-Me4bpz material demonstrate excellent specific capacity and cycling performance, and the crystal structure is well preserved after the electrochemical tests, suggesting the potential of developing flexible layered MOFs for efficient and stable electrochemical storage.
authors: Laboratory of Advanced Materials, Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China.
authors: Tiance
authors: T
authors: An
authors: Laboratory of Advanced Materials, Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China.
authors: Yuhang
authors: Y
authors: Wang
authors: Laboratory of Advanced Materials, Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China.
authors: Jing
authors: J
authors: Tang
authors: Laboratory of Advanced Materials, Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China.
authors: Yang
authors: Y
authors: Wang
authors: Laboratory of Advanced Materials, Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China. Electronic address: zhanglijuan@fudan.edu.cn.
authors: Lijuan
authors: L
authors: Zhang
authors: Laboratory of Advanced Materials, Department of Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China. Electronic address: gfzheng@fudan.edu.cn.
authors: Gengfeng
authors: G
authors: Zheng
mesh_terms: D011211:Electric Power Supplies; D008094:Lithium / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D011720:Pyrazoles / Q000737:chemistry*
chemical_list: D009942:Organometallic Compounds; D011720:Pyrazoles; D009532:Nickel; D008094:Lithium
keywords: Azolate ligand; Coulombic efficiency; Li-ion battery; Metal–organic framework; Structural flexibility