ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Jian Zhang,Tianlin Li,Qingyan Yuan,Yunjia Wu,Yibo Dou,Jingbin Han
Transition-metal compounds (oxides, sulfides, hydroxides, etc.) as lithium-ion battery (LIB) anodes usually show extraordinary capacity larger than the theoretical value due to the transformation of LiOH into Li2O/LiH. However, there has rarely been a report relaying the transformation of LiOH into Li2O/LiH as the main reaction for LIBs, due to the strong alkalinity of LiOH leading to battery deterioration. In this work, layered silicate MgAl saponite (MA-SAP) is applied as a −OH donor to generate LiOH as the anode material of LIBs for the first time. The MA-SAP maintains a layered structure during the (dis)charging process and has zero-strain characteristic on the (001) crystal plane. In the discharging process, Mg, Al, and Si in the saponite sheets become electron-rich, while the active hydroxyl groups escape from the sheets and combine with lithium ions to form LiOH in the “caves” on sheets, and the LiOH continues to decompose into Li2O and LiH. Consequently, the MA-SAP delivers a maximum capacity of 536 mA h·g–1 at 200 mA·g–1 with a good high-current discharging ability of 155 mA h·g–1 after 1000 cycles under 1 A·g–1. Considering its extremely low cost and completely nontoxic characteristics, MA-SAP has great application prospects in energy storage. In addition, this work has an enlightening effect on the development of new anodes based on extraordinary mechanisms.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
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IF 5.2
Rui Zhang,Pengbin Wang,Qinghu Guo,Jiale Long,Taixiang Huang,Zhonghua Yao,Minghe Cao,Hanxing Liu,Hua Hao
Piezoelectric ceramics with high strain response and low hysteresis are highly in demand for high-performance actuator applications. Unfortunately, the trade-off relationship between large field-induced strain and low hysteresis in piezoelectric ceramics is a key challenge for designing high-performance piezoelectric actuators. Herein, y mol%La-doped 0.10 Pb(In 1/2 Nb 1/2 )O 3 - x PbZrO 3 -(0.90 – x )PbTiO 3 [0.10PIN- x PZ-(0.90-x)PT: y mol%La] ternary relaxor ferroelectric ceramics were prepared by conventional solid-state reaction technique. Pb(In 1/2 Nb 1/2 )O 3 (PIN) as a relaxor end member was introduced into (Pb,La) (Zr,Ti)O 3 (PLZT) system to improve relaxor characteristics and strain properties. A giant strain of 0.23% was obtained in 0.10PIN-0.59PZ-0.31 PT: 8mol%La ceramic at the electric field of 20 kV/cm, with a high piezoelectric d 33 * of 1150 pm/V and low hysteresis H y of 6.4%, exhibiting a potential application in high-performance piezoelectric actuators. Furthermore, the effects of La ion doping and components on the ferroelectric, dielectric and electric field-induced strain properties were investigated, and provides a new way for improve the strain properties of piezoelectric materials .
研究领域:
材料科学
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物理学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 32
·期 1
·2106911
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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
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
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IF 5.2
Yuanshui Liu,Feng Luo,Denghui Jiang,Linzhuang Xing,Liwei Song,Zhimin Li
Lead-based Pb(Zr, Ti)O 3 ceramics have been widely applied in piezoelectric actuators, and yet high temperature stability and large strain have been pursued for further application. In this work, a novel PbZrO 3 –PbTiO 3 -(Bi 0.5 Na 0.5 )TiO 3 (PZ-PT-BNT) piezoelectric ceramic is designed and prepared by solid-state route. It is found that the introduction of BNT constituent enhances the relaxation behavior of PZ-PT ceramic, inhibits the abrupt change in dielectric properties near Curie temperature , and increases the proportion of tetragonal phase with high temperature stability. Meanwhile, the patterns of electric domains are intentionally modified by adjusting composition of PZ-PT-BNT. Short and broad electric domains in PZ-PT-0.03BNT ceramic are observed by piezoresponse force microscopy, which are insensitive to temperature and have faster response under electric field, contributing to strain characteristics. As a result, through integrating phase structure and electric domain configuration, a strain of 0.21% and excellent temperature stability where the variation of strain is less than 8% in the temperature range of 25–250 °C are achieved in PZ-PT-0.03BNT ceramic. The findings provide an effective strategy for improving the strain stability of PZ-PT-based piezoelectric ceramics, and demonstrate that PZ-PT-BNT ceramics have potential application prospects in high-temperature piezoelectric actuators.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2022
·Vol. 106
·期 2
·1127-1138
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IF 4.186
Yuwei Ding,Zhiyong Liu,Bing Xie,Fang Wang,Kun Guo,Pu Mao,Bingliang Liang,Jinshan Lu
Both high strain and low driving electric-field are important characteristics of the piezoelectric actuators for industrial applications, but they are difficult to achieve together in a single material system. In this work, the layered and inlay-onlay structures of relaxor/ferroelectric composites were prepared by selecting relaxor phase (0.94Bi 0.5 (Na 0.82 K 0.18 ) 0.5 TiO 3 -0.06NaNbO 3 , BNKT-6NN) and ferroelectric phase (0.9Bi 0.5 Na 0.5 TiO 3 -0.1Bi 0.2 Sr 0.7 TiO 3 , BNT-10BST) with the volume ratio of 1:1. By comparing the field-induced strains under same electric-field, the S 33 of the BNKT-6NN/BNT-10BST layered composites (0.17%) was greater than that of the inlay-onlay composites (0.08%) and exhibited excellent temperature stability. The superiority in field-induced strain for the layered composite ceramic was originated from the inhomogeneous distribution of internal electric-field between relaxor and ferroelectric phase and thereby could modulate the polar nanoregions to ferroelectric phase transition. In addition, the restricted phase boundary between relaxor and ferroelectric phase enhanced the potential barrier energy ( E a = 1.47 eV) and hindered the jump of defective ions (mainly oxygen vacancies) of the BNKT-6NN/BNT-10BST layered composites. The outstanding electrical properties of layered composite ceramics provide a new idea for further improving field-induced strain performance.
研究领域:
材料科学
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物理学
✓ 已验证
产品关联
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
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材料科学
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电化学
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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）