Preparation of new Nb(PO<sub>4</sub>)O derived from supramolecular polymer and its application in sodium ion batteries

GU Xin; SHANG Xinchao; WANG Mingqing; LIU Tao; XING Tao; LI Yueran; LI Zhongtao

doi:10.16152/j.cnki.xdxbzr.2024-02-008

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Preparation of new Nb(PO₄)O derived from supramolecular polymer and its application in sodium ion batteries

更新时间：2024-04-19

- Preparation of new Nb(PO₄)O derived from supramolecular polymer and its application in sodium ion batteries
- Journal of Northwest University (Natural Science Edition) Vol. 54, Issue 2, Pages: 220-229(2024)
- 作者机构：
  
  1.中国石油大学(华东)　化学化工学院/重质油国家重点实验室，山东　青岛　266580
  2.山东能源集团有限公司　大型煤气化及煤基新材料国家工程研究中心，山东　济南　250100
- 作者简介：
- 基金信息：
- DOI：10.16152/j.cnki.xdxbzr.2024-02-008
  CLC： TQ050.4
- Published：25 April 2024，
  
  Received：26 December 2023，
扫描看全文
GU Xin, SHANG Xinchao, WANG Mingqing, et al. Preparation of new Nb(PO₄)O derived from supramolecular polymer and its application in sodium ion batteries. [J]. Journal of Northwest University (Natural Science Edition) 54(2):220-229(2024)
DOI：

GU Xin, SHANG Xinchao, WANG Mingqing, et al. Preparation of new Nb(PO₄)O derived from supramolecular polymer and its application in sodium ion batteries. [J]. Journal of Northwest University (Natural Science Edition) 54(2):220-229(2024) DOI： 10.16152/j.cnki.xdxbzr.2024-02-008.

摘要

由于资源有限和成本较高，锂电池的大规模应用受到影响。相比之下，钠资源储量丰富，作为锂的替代品逐渐得到重视。然而，由于钠离子较大的半径，在电极嵌入/脱出过程中会使材料发生较大的体积变化，导致结构坍塌。要实现钠电的高性能应用，必须研发具有长循环寿命和优良倍率性能的负极材料。通过植酸三聚氰胺超分子聚合物辅助，运用一步煅烧法合成了一种新型的聚阴离子化合物氧化磷酸铌Nb(PO

)O。该材料具备稳定的大框架结构，保证了钠离子的快速传输；表面疏松的片状结构有利于电解液和电极之间进行传质，有效缩短扩散路径。当用作钠电负极组装钠离子电池时，在1 000 mA·g

－1

的电流密度下，3 000次循环以后可逆放电比容量达到133.7 mA·h·g

－1

；在4 000 mA·g

－1

的高电流密度下，可逆比容量仍有117.9 mA·h·g

－1

，与Nb

相比，具有明显的倍率性能和超长的循环稳定性。

Abstract

Due to the limited distribution of lithium resources

the high cost disadvantage of lithium-ion battery gradually affects its large-scale application. In contrast

sodium resources are abundant in the world

as a substitute for lithium gradually gained widespread attention. However

due to the large radius of sodium ions

the material will undergo a large volume change during electrode insertion/removal

resulting in structural collapse. Therefore

in order to realize the high performance application of sodium electricity

it is necessary to develop cathode materials with long cycle life and good magnification performance. A novel polyanionic compound

niobium phosphate oxide Nb(PO

was synthesized by one-step calcination with phytate-melamine supramolecular polymer assisted strategy. First of all

the material has a stable large frame structure to ensure the rapid transmission of sodium ions. Secondly

the loose sheet structure of the surface is conducive to the mass transfer between the electrolyte and the electrode

effectively shortening the diffusion path. When used as a sodium anode

the group of sodium ion batteries

in 1 000 mA·g

-1

current density

3 000 cycles after reversible discharge capacity can reach 133.7 mA·h·g

-1

in 4 000 mA·g

-1

high current density

reversible specific capacity is still 117.9 mA·h·g

-1

. Compared with Nb

it has obvious magnification performance and long cycle stability.

关键词

钠离子电池负极材料聚阴离子化合物氧化磷酸铌

Keywords

sodium ion batterynegative electrode materialspolyanion compoundniobium phosphate oxide

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Preparation of new Nb(PO4)O derived from supramolecular polymer and its application in sodium ion batteries

DOI：10.16152/j.cnki.xdxbzr.2024-02-008

摘要

Abstract

关键词

Keywords

references

Preparation of new Nb(PO₄)O derived from supramolecular polymer and its application in sodium ion batteries