Research & Development

Study on improvement of capacitance performance of NiMn-LDH electrode material by anions exchange

  • Qunfang LIANG ,
  • Xuetang XU ,
  • Fan WANG
Expand
  • School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China

Received date: 2021-04-06

  Online published: 2022-03-14

Abstract

NiMn-LDH nanosheet arrays on Ni foam were synthesized via one-step hydrothermal method,and the capacitive performance was enhanced by soaking the nanoarrays on KOH solution.The as-obtained electrode before and after the soaking process were characterized by SEM,XRD,TEM and XPS technologies.The results showed that the morphology of NiMn-LDH electrode did not change before and after immersion,but anion exchange reaction between CO32- and OH- anions was occurred in the electrode materials obviously,which reduced the distribution quantity of large CO32- between LDH layers,made the space in the layer become the“reservoir”of OH-,and reduced the migration distance of OH- in the charge storage process.Therefore,the capacitance performance had been significantly improved.The electrochemical test results showed that the speci-fic capacitance of the electrode increased from 18.0 F/g to 766.6 F/g(1.69 F/cm2) at the current density of 5 mA/cm2.When the power density of the all solid-state asymmetric supercapacitor assembled with the electrode and activated carbon was 900 W/kg,the displayed energy density was 35.9 W·h/kg,and the cycle stability of the device was good.

Cite this article

Qunfang LIANG , Xuetang XU , Fan WANG . Study on improvement of capacitance performance of NiMn-LDH electrode material by anions exchange[J]. Inorganic Chemicals Industry, 2022 , 54(2) : 38 -44 . DOI: 10.19964/j.issn.1006-4990.2021-0223

References

[1] NGUYEN T, MONTEMOR M. Metal oxide and hydroxide-based aqueous supercapacitors:From charge storage mechanisms and functional electrode engineering to need-tailored devices[J]. Adva-nced Science, 2019, 6.Doi: 10.1002/advs.201801797.
[2] 张硕嘉, 杨玉彬, 唐宇, 等. 高活性Fe2O3@Ni复合电极制备及电化学性能研究[J]. 无机盐工业, 2019, 51(7):24-27.
[3] CHOUDHARY N, LI C, MOORE J, et al. Supercapacitors:Asymme-tric supercapacitor electrodes and devices[J]. Advanced Materials, 2017, 29.Doi: 10.1002/adma.201605336.
[4] 赵杰, 郭月, 沈桢, 等. 高倍率容量层状双金属氢氧化物超级电容材料的研究进展[J]. 化工学报, 2020, 71(11):4851-4872.
[5] 王文聪. 层状双金属氢氧化物超级电容器电极材料的制备和电化学性能研究[D]. 杭州:浙江大学, 2019.
[6] WANG R, YAO M, NIU Z. Smart supercapacitors from materials to devices[J]. InfoMat, 2020, 2:113-125.
[7] 朱基亮. 超级电容器用金属层状双氢氧化物电极材料研究进展[J]. 四川师范大学学报:自然科学版, 2020, 43(3):285-296.
[8] 雷娜, 马翩翩. Ni-Co LDHs纳米片阵列用于超级电容器电极的研究[J]. 浙江理工大学学报:自然科学版, 2020, 43(6):58-64.
[9] XU R, DU L, ADEKOYA D, et al. Well-defined nanostructures for electrochemical energy conversion and storage[J]. Advanced Ener-gy Materials, 2020, 10.Doi: 10.1002/aenm.202001537.
[10] 李宫, 陈昆峰, 金京一, 等. La3+掺杂NiCo层状双金属氢氧化物纳米片的合成及其电化学性能[J]. 应用化学, 2017(34):71-75.
[11] LIU H B, LI J C, YE L, et al. Co1-x-yNixZny(CO3)0.5(OH)·0.11H2O nanoneedles-NiCo-layered double hydroxide nanosheet compos-ites on vulcanized Ni foams for supercapacitors[J]. ACS Applied Nano Materials, 2021, 4(2):1743-1753.
[12] WANG Y, YAN D, EL HANKARI S, et al. Recent progress on lay-ered double hydroxides and their derivatives for electrocatalytic water splitting[J]. Advanced Science, 2018, 5(8).Doi: 10.1002/advs.201800064.
[13] WANG X L, ZHANG J Q, YANG S B, et al. Interlayer space regu- lating of NiMn layered double hydroxides for supercapacitors by controlling hydrothermal reaction time[J]. Electrochimica Acta, 2019, 295:1-6.
[14] TANG Y Q, SHEN H M, CHENG J Q, et al. Fabrication of oxygen-vacancy abundant NiMn-layered double hydroxides for ultrahigh capacity supercapacitors[J]. Advanced Functional Materials, 2020, 30.Doi: 10.1002/adfm.201908223.
[15] 邹文茹. 阴离子交换法增强Ni-Co基纳米阵列电极性能的研究[D]. 南宁:广西大学, 2019.
[16] YANG T Y, YE J, CHEN S H, et al. Construction of nanowall-su-pported-nanorod nico ldh array electrode with high mass-loadingon carbon cloth for high-performance asymmetric supercapacitors[J]. Electrochimica Acta, 2020, 362.Doi: 10.1016/j.electacta.2020.137081.
[17] ZANG Y, LUO H, ZHANG H, et al. Polypyrrole nanotube-interco-nnected NiCo-LDH nanocages derived by ZIF-67 for supercapac-itors[J]. ACS Applied Energy Materials, 2021, 4(2):1189-1198.
[18] LIU X, ZHOU A, PAN T, et al. Ultrahigh-rate-capability of a layered double hydroxide supercapacitor based on a self-generated elec-trolyte reservoir[J]. Journal of Materials Chemistry A, 2016(4):8421-8427.
[19] WEI M, MA R, WU J, et al. Development of efficient electrocataly-sts via molecular hybridization of NiMn layered double hydroxide nanosheets and graphene[J]. Nanoscale, 2016, 8(19):10425-10432.
[20] CHEN D M, YAN S, CHEN H J, et al. Hierarchical Ni-Mn layered double hydroxide grown on nitrogen-doped carbon foams as high-performance supercapacitor electrode[J]. Electrochimica Acta, 2018, 292:374-382.
[21] YU M, LIU R L, LIU J H, et al. Polyhedral-like NiMn-layered dou-ble hydroxide/porous carbon as electrode for enhanced electroche-mical performance supercapacitors[J]. Small, 2017, 13(44).Doi: 10.1002/smll.201702616.
[22] CHEN H Y, AI Y N, LIU F, et al. Carbon-coated hierarchical Ni-Mn layered double hydroxide nanoarrays on Ni foam for flexible high-capacitance supercapacitors[J]. Electrochimica Acta, 2016, 213:55-65.
[23] SUN L, ZHANG Y X, ZHANG Y, et al. Reduced graphene oxide nanosheet modified NiMn-LDH nanoflake arrays for high-perfor-mance supercapacitors[J]. Chemical Communications, 2018, 54(72):10172-10175.
[24] XU T, LI G, YANG X, et al. Design of the seamless integrated C@NiMn-OH-Ni3S2/Ni foam advanced electrode for supercapaci-tors[J]. Chemical Engineering Journal, 2019, 362:783-793.
Outlines

/