Sub-20 nm Carbon Nanoparticles with Expanded Interlayer Spacing for High-Performance Potassium Storage

Gan, Qingmeng1,2; Xie, Jiwei2; Zhu, Youhuan2; Zhang, Fangchang2; Zhang, Peisen3; He, Zhen1; Liu, Suqin1

2019-01-09

10.1021/acsami.8b18553

ACS Applied Materials & Interfaces   影响因子和分区

1944-8244

1944-8252

Carbon materials are most promising candidates for potassium-ion battery (PIB) anodes because of their high electrical conductivities, rational potassium storage capabilities, and low costs. However, the large volume change during the K-ion insertion/extraction and the sluggish kinetics of K-ion diffusion inhibit the development of carbon-based materials for PIBs. Here, under the guidance of density functional theory, N/P-codoped ultrafine (<= 20 nm) carbon nanoparticles (NP-CNPs) with an expanded interlayer distance, improved electrical conductivity, shortened diffusion distance of K ions, and promoted adsorption capability toward K ions are synthesized through a facile solvent-free method as a high-performance anode material for PIBs. The NP-CNPs show a high capacity of 270 mA h g(-1) at 0.2 A g(-1), a remarkable rate capability of 157 mA h g(-1) at an extremely high rate of 5.0 A g(-1), and an ultralong cycle life with a high capacity of 190 mA h g(-1) and a retention of 86.4% at 1.0 A g(-1) after 4000 cycles. The potassium storage mechanism and low volume expansion for NP-CNPs are revealed through cyclic voltammetry, in situ Raman, and ex situ XRD. This work paves a new way to design and fabricate carbon-based nanostructures with high reversible capacity, great rate capability, and stable long-term performance.

potassium-ion batteries N/P-codoped carbon ultrafine carbon nanoparticles ultralong cycle life

SCI ; EI

英语

其他

Innovation-Driven Project of Central South University[2016CXS031]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000455561200098

AMER CHEMICAL SOC

20190306375190

Anodes ; Carbon ; Charging (batteries) ; Cyclic voltammetry ; Density functional theory ; Electric conductivity ; Ions ; Nanoparticles ; Potassium ; Synthesis (chemical)

Alkali Metals:549.1 ; Storage:694.4 ; Electricity: Basic Concepts and Phenomena:701.1 ; Secondary Batteries:702.1.2 ; Electron Tubes:714.1 ; Nanotechnology:761 ; Electrochemistry:801.4.1 ; Chemical Reactions:802.2 ; Chemical Products Generally:804 ; Probability Theory:922.1 ; Solid State Physics:933

Web of Science

1.Cent S Univ, Hunan Prov Key Lab Chem Power Sources, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
3.Chinese Acad Sci, Key Lab Colloid Interface & Chem Thermodynam, CAS Res Educ Ctr Excellence Mol Sci, Inst Chem, Beijing 100190, Peoples R China

Gan, Qingmeng,Xie, Jiwei,Zhu, Youhuan,et al. Sub-20 nm Carbon Nanoparticles with Expanded Interlayer Spacing for High-Performance Potassium Storage[J]. ACS Applied Materials & Interfaces,2019,11(1):930-939.

Gan, Qingmeng.,Xie, Jiwei.,Zhu, Youhuan.,Zhang, Fangchang.,Zhang, Peisen.,...&Liu, Suqin.(2019).Sub-20 nm Carbon Nanoparticles with Expanded Interlayer Spacing for High-Performance Potassium Storage.ACS Applied Materials & Interfaces,11(1),930-939.

Gan, Qingmeng,et al."Sub-20 nm Carbon Nanoparticles with Expanded Interlayer Spacing for High-Performance Potassium Storage".ACS Applied Materials & Interfaces 11.1(2019):930-939.