Advanced Science
·
2024
·
IF 14.3
Maolin Yang,Ziwei Chen,Zhongyuan Huang,Rui Wang,Wenhai Ji,Dong Zhou,Tao Zeng,Yongsheng Li,Jun Wang,Liguang Wang,Tingting Yang,Yinguo Xiao
The development of the electric vehicle industry has spurred demand for secondary batteries capable of rapid-charging and slow-discharging. Among them, sodium-ion batteries (SIBs) with layered oxide as the cathode exhibit competitive advantages due to their comprehensive electrochemical performance. However, to meet the requirements of rapid-charging and slow-discharging scenarios, it is necessary to further enhance the rate performance of the cathode material to achieve symmetrical capacity at different rates. Simultaneously, minimizing lattice strain during asymmetric electrochemical processes is also significant in alleviating strain accumulation. In this study, the ordered distribution of transition metal layers and the diffusion pathway of sodium ions are optimized through targeted K-doping of sodium layers, leading to a reduction of the diffusion barrier and endowment of prominent rate performance. At a 20C rate, the capacity of the cathode can reach 94% of that at a 0.1C rate. Additionally, the rivet effect of the sodium layers resulted in a global volume strain of only 0.03% for the modified cathode during charging at a 10C rate and discharging at a 1C rate. In summary, high-performance SIBs, with promising prospects for rapid-charging and slow-discharging capability, are obtained through the regulation of sodium layers, opening up new avenues for commercial applications.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 32
·期 1
·2106911
·
IF 18.808
Xuhui Xiong,Liting Yang,Guisheng Liang,Chao Wang,Guanyu Chen,Ziqi Yang,Renchao Che
The oxide perovskite family holds great promise for diverse applications on account of their unique chemical and physical properties. However, owing to the inadequate Li + -storage sites, the insertion-type perovskite anodes for lithium-ion batteries (LIBs) are limited. A-site deficient perovskites with rich intrinsic vacancies and ion transport channels are believed to be the desirable hosts of superior Li + storage. Herein, the perovskite Li 0.1 La 0.3 NbO 3 (LLNO) is designed and demonstrated as the remarkable anode for LIBs with a high specific capacity, a safe operating voltage, an excellent rate performance, and a long cycling life. More importantly, the outstanding cycling stability of LLNO is originated from its low strain characteristic with a maximum volume change of only 1.17%. The exceptional rate performance can be explained by the unconventional Li + transport pathways with external → grain boundaries → lattice deficiencies. These results not only reveal that A-site deficient perovskite LLNO is a promising anode for LIBs but also provide fundamental insights into the Li + ions transport mechanism, facilitating the development of high-performance perovskite anodes.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 9
·期 5
·1822-1828
·
IF 7.059
Mingcheng Wang,Hongwei Zhou,Xilang Jin,Hanbin Liu,Aijie Ma,Hanbing Yan,Lin Chen,Weixing Chen
Compliance and low strain hysteresis are of great importance for wearable devices and electronic skins, but it is still a challenge to obtain materials with high compliance, low strain hysteresis and sensing ability for electronic skins. In this work, we have achieved highly compliant and low strain hysteresis sensory electronic skins (SESs) utilizing solution processable hybrid hydrogels. The hybrid hydrogels are constructed by incorporating polyaniline (PANI) into poly(vinyl alcohol) (PVA). By regulating the contents of PVA and PANI, the elastic modulus of the PVA/PANI hybrid hydrogels can be tuned in the range of 15.7–154.4 kPa, which covers the elastic modulus of human soft tissue (≈30 kPa). The PVA/PANI hybrid hydrogels also achieve low strain hysteresis and exhibit outstanding recovery during the cyclic loading–unloading process. In such hydrogels, PANI works as the conductive component and contributes to the conductivity of the hybrid hydrogels (13.3 S m−1). Further investigations reveal that the compliant SESs possess high sensitivity (GF = 4.28), outstanding stability (>1000 cycles) and low response time (250 ms). Because of the fully physically cross-linked structure, the hydrogels in SESs are completely solution processable and can be regenerated. By introducing glycerol into the hybrid hydrogels, the flexibility of SESs can be kept at least for one week and the sensing ability is also well maintained. Finally, we demonstrate that SESs exhibit reliable sensing ability in monitoring representative human movements, such as joint bending and swallowing.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xiyue Zhang,Minjie Hou,Jianyong Zhang,Yingjie Zhou,Fupeng Li,Kun Ren,Xuantian Feng,Pengyu Dou,Sicheng Bi,Katsuro Hayashi,Lin Xu,Feng Liang
Alluaudite-type Na 2+2δ Fe 2- δ (SO 4 ) 3 , characterized by its cost-effectiveness and high operating voltage, has emerged as a prospective cathode material for sodium-ion batteries (SIBs). However, poor electronic conductivity and sluggish reaction kinetics hinder its practical application. In this study, we developed a low-strain spherical Na 2.5 Fe 1.75 (SO 4 ) 3 @C@KB (NFS@C@KB) cathode, enclosed within highly conductive Ketjen Black (KB) using a scalable spray-drying method. In-situ X-ray diffraction analysis revealed that the nearly zero-volume strain originates from the synergistic effect of the dense spherical configuration and pearl-like KB branched chains, effectively enhancing the structural stability and prolonging the cycle life. Moreover, the interconnected KB network establishes a continuous electron transport pathway, thereby improving the electronic conductivity. The optimized NFS@C@KB cathode delivered a capacity of 75 mAh g −1 at 5C and exhibited remarkable cycling stability over 4000 cycles. Even under the extreme condition of −20 °C, it retained a discharge capacity of 63 mAh g −1 at a rate of 1C. Consequently, the combination of a low-strain structure and outstanding electrochemical performance is expected to stimulate further exploration of iron-based sulfate cathodes and promote the development of rechargeable SIBs for energy storage applications.
研究领域:
储能技术
·
材料科学
·
电化学
·
无机化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energy Storage Materials
·
2020
·
IF 16.28
Qingfeng Fu,Xiangzhen Zhu,Renjie Li,Guisheng Liang,Lijie Luo,Yongjun Chen,Yuanli Ding,Chunfu Lin,Kuikui Wang,Xiu Song Zhao
M–Nb–O compounds are regarded as advanced anode materials of lithium-ion batteries owing to their large capacities, high safety and fast Li + transport. However, challenges remain in the exploitation of new M–Nb–O compounds with low strains to enable superior cyclability. Here, we exploit V 3 Nb 17 O 50 as a low-strain M–Nb–O anode compound, and V 3 Nb 17 O 50 micron-sized particles (V 3 Nb 17 O 50 -MP) and submicron-sized rods (V 3 Nb 17 O 50 -SR) are demonstrated. V 3 Nb 17 O 50 owns an open and robust shear ReO 3 crystal structure, which is constructed by 3 × 3 × ∞ (V,Nb)O 6 octahedron-blocks linked by VO 4 tetrahedra. The resulting A–B–A layered structure with a large interlayer spacing enables the superior Li + diffusivity and significant intercalation-pseudocapacitive behavior in V 3 Nb 17 O 50 . The maximum unit-cell volume expansion of V 3 Nb 17 O 50 discharged to 0.8 V is only 3.46% (the smallest value among the known M–Nb–O anode compounds with shear ReO 3 structures), leading to the excellent cyclability of V 3 Nb 17 O 50 -MP/V 3 Nb 17 O 50 -SR with 90.0/91.8% capacity retention over 2000 cycles at 10C. V 3 Nb 17 O 50 -MP/V 3 Nb 17 O 50 -SR further exhibits a safe operating potential of 1.736/1.724 V, large reversible capacity of 207/254 mA h g −1 at 0.1C, and high rate performance with 68/123 mA h g −1 at 10C. A LiMn 2 O 4 //V 3 Nb 17 O 50 -SR full cell also exhibits comprehensively good electrochemical properties , including excellent cyclability with 85.7% capacity retention over 500 cycles at 5C. Therefore, V 3 Nb 17 O 50 can be a very promising anode compound for stable, safe, large-capacity and fast-charging Li + storage.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
纳米结构材料
·
固态化学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Zhao Xiaolin,Li Yi,Wang Youwei,Song Erhong,Ma Ruguang,Liu Jianjun
The advancement of cathode materials possessing high-rate capability and extended cycle life is crucial for the viability of large-scale energy storage in sodium-ion batteries. A layered-columnar material NaFe[O 3 PCH(OH)CO 2 ] is designed with 2D grid-like channels for sodium ion migration. Operating on the Fe 2+ /Fe 3+ redox reaction, NaFe[O 3 PCH(OH)CO 2 ] exhibits a reversible specific capacity of 106.1 mAh g -1 after 50 cycles within the voltage range of 1.5–4.2 V, reaching 93.4% of the theoretical specific capacity. Experimental and theoretical investigations show that NaFe[O 3 PCH(OH)CO 2 ] exhibits low-strain characteristics during discharge and charge processes. The presence of stable C-P covalent bonds between organic layers and inorganic columns ([FeO 6 ] and [CPO 3 ]) plays a pivotal role in achieving its long cycle life. Even under high current density of 240 mA g –1 , it maintains satisfactory capacities, delivering 61.6 mAh g –1 after the 1000th cycles, indicating a capacity retention rate of 92.2% with only 0.0078% loss per cycle. This study indicates that layered-columnar structure design offers a viable strategy for the development of high-performance positive electrode material for sodium-ion batteries.
研究领域:
储能
·
材料科学
·
电化学
·
电池技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）