全文获取类型
收费全文 | 250篇 |
免费 | 147篇 |
国内免费 | 34篇 |
出版年
2024年 | 4篇 |
2023年 | 4篇 |
2022年 | 3篇 |
2021年 | 3篇 |
2020年 | 34篇 |
2019年 | 45篇 |
2018年 | 44篇 |
2017年 | 48篇 |
2016年 | 30篇 |
2015年 | 31篇 |
2014年 | 28篇 |
2013年 | 19篇 |
2012年 | 7篇 |
2011年 | 16篇 |
2010年 | 6篇 |
2009年 | 3篇 |
2008年 | 4篇 |
2007年 | 5篇 |
2006年 | 9篇 |
2005年 | 7篇 |
2004年 | 4篇 |
2003年 | 5篇 |
2002年 | 8篇 |
2001年 | 2篇 |
2000年 | 4篇 |
1999年 | 9篇 |
1998年 | 4篇 |
1997年 | 5篇 |
1996年 | 3篇 |
1995年 | 5篇 |
1994年 | 3篇 |
1993年 | 4篇 |
1992年 | 6篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1986年 | 2篇 |
1985年 | 4篇 |
1984年 | 4篇 |
1982年 | 4篇 |
1981年 | 2篇 |
排序方式: 共有431条查询结果,搜索用时 15 毫秒
221.
The Fine Line between a Two‐Phase and Solid‐Solution Phase Transformation and Highly Mobile Phase Interfaces in Spinel Li4+xTi5O12
下载免费PDF全文
![点击此处可从《Liver Transplantation》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Swapna Ganapathy Alexandros Vasileiadis Jouke R. Heringa Marnix Wagemaker 《Liver Transplantation》2017,7(9)
Phase transitions play a crucial role in Li‐ion battery electrodes being decisive for both the power density and cycle life. The kinetic properties of phase transitions are relatively unexplored and the nature of the phase transition in defective spinel Li4+xTi5O12 introduces a controversy as the very constant (dis)charge potential, associated with a first‐order phase transition, appears to contradict the exceptionally high rate performance associated with a solid–solution reaction. With the present density functional theory study, a microscopic mechanism is put forward that provides deeper insight in this intriguing and technologically relevant material. The local substitution of Ti with Li in the spinel Li4+xTi5O12 lattice stabilizes the phase boundaries that are introduced upon Li‐ion insertion. This facilitates a subnanometer phase coexistence in equilibrium, which although very similar to a solid solution should be considered a true first‐order phase transition. The resulting interfaces are predicted to be very mobile due to the high mobility of the Li ions located at the interfaces. This highly mobile, almost liquid‐like, subnanometer phase morphology is able to respond very fast to nonequilibrium conditions during battery operation, explaining the excellent rate performance in combination with a first‐order phase transition. 相似文献
222.
Gwang‐Hee Lee Seun Lee Jae‐Chan Kim Dong Wook Kim Yongku Kang Dong‐Wan Kim 《Liver Transplantation》2017,7(6)
Lithium‐oxygen batteries represent a significant scientific challenge for high‐rate and long‐term cycling using oxygen electrodes that contain efficient electrocatalysts. The mixed transition metal oxide catalysts provide the most efficient catalytic activity for partial heterogeneous surface cations with oxygen vacancies as the active phase. They include multiple oxidation states and oxygen vacancies. Here, using a combination of transmission electron microscopy, differential electrochemical mass spectrometry, X‐ray photoelectron spectroscopy, and electrochemical properties to probe the surface of the MnMoO4 nanowires, it is shown that the intrinsic MnMoO4 oxygen vacancies on the oxygen electrode are an effective strategy to achieve a high reversibility and high efficiency for lithium‐oxygen (Li‐O2) batteries. The modified MnMoO4 nanowires exhibit a highly stable capacity at a fixed capacity of 5000 mA h gsp?1 (calculated weight of Super P carbon black) during 50 cycles, a high‐rate capability at a current rate of 3000 mA gsp?1 during 70 cycles, and a long‐term reversible capacity during 188 cycles at a fixed capacity of 1000 mA h gsp?1. It is demonstrated that this strategy for creating mixed transition metal oxides (e.g., MnMoO4) may pave the way for the new structural design of electrocatalysts for Li‐O2 batteries. 相似文献
223.
224.
Best Practices for Mitigating Irreversible Capacity Loss of Negative Electrodes in Li‐Ion Batteries
下载免费PDF全文
![点击此处可从《Liver Transplantation》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Development of high performance lithium‐ion (Li‐ion) power packs is a topic receiving significant attention in research today. Future development of the Li‐ion power packs relies on the development of high capacity and high rate anodes. More specifically, materials undergo either conversion or an alloying mechanism with Li. However, irreversible capacity loss (ICL) is one of the prime issues for this type of negative electrode. Traditional insertion‐type materials also experience ICL, but it is considered negligible. Therefore, eliminating ICL is crucial before the fabrication of practical Li‐ion cells with conventional cathodes such as LiFePO4, LiMn2O4, etc. There are numerous methods for eliminating ICL such as pre‐treating the electrode, usage of stabilized Li metal powder, chemical and electrochemical lithiation, sacrificial salts for both anode and cathode, etc. The research strategies that have been explored are reviewed here in regards to the elimination of ICL from the high capacity anodes as described. Additionally, mitigating ICL observed from the carbonaceous anodes is discussed and compared. 相似文献
225.
Lukas Porz Tushar Swamy Brian W. Sheldon Daniel Rettenwander Till Frömling Henry L. Thaman Stefan Berendts Reinhard Uecker W. Craig Carter Yet‐Ming Chiang 《Liver Transplantation》2017,7(20)
Li deposition is observed and measured on a solid electrolyte in the vicinity of a metallic current collector. Four types of ion‐conducting, inorganic solid electrolytes are tested: Amorphous 70/30 mol% Li2S‐P2S5, polycrystalline β‐Li3PS4, and polycrystalline and single‐crystalline Li6La3ZrTaO12 garnet. The nature of lithium plating depends on the proximity of the current collector to defects such as surface cracks and on the current density. Lithium plating penetrates/infiltrates at defects, but only above a critical current density. Eventually, infiltration results in a short circuit between the current collector and the Li‐source (anode). These results do not depend on the electrolytes shear modulus and are thus not consistent with the Monroe–Newman model for “dendrites.” The observations suggest that Li‐plating in pre‐existing flaws produces crack‐tip stresses which drive crack propagation, and an electrochemomechanical model of plating‐induced Li infiltration is proposed. Lithium short‐circuits through solid electrolytes occurs through a fundamentally different process than through liquid electrolytes. The onset of Li infiltration depends on solid‐state electrolyte surface morphology, in particular the defect size and density. 相似文献
226.
Jianming Zheng Seungjun Myeong Woongrae Cho Pengfei Yan Jie Xiao Chongmin Wang Jaephil Cho Ji‐Guang Zhang 《Liver Transplantation》2017,7(6)
The lithium‐ and manganese‐rich (LMR) layered structure cathodes exhibit one of the highest specific energies (≈900 W h kg?1) among all the cathode materials. However, the practical applications of LMR cathodes are still hindered by several significant challenges, including voltage fade, large initial capacity loss, poor rate capability and limited cycle life. Herein, we review the recent progress and in depth understandings on the application of LMR cathode materials from a practical point of view. Several key parameters of LMR cathodes that affect the LMR/graphite full‐cell operation are systematically analyzed. These factors include the first‐cycle capacity loss, voltage fade, powder tap density, and electrode density. New approaches to minimize the detrimental effects of these factors are highlighted in this work. We also provide perspectives for the future research on LMR cathode materials, focusing on addressing the fundamental problems of LMR cathodes while keeping practical considerations in mind. 相似文献
227.
Unity Convoluted Design of Solid Li‐Ion Battery and Triboelectric Nanogenerator for Self‐Powered Wearable Electronics
下载免费PDF全文
![点击此处可从《Liver Transplantation》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Wearable electronics suffer from severe power shortage due to limited working time of Li‐ion batteries, and there is a desperate need to build a hybrid device including energy scavenging and storing units. However, previous attempts to integrate the two units are mainly based on simple external connections and assembly, so that maintaining small volume and low manufacturing cost becomes increasingly challenging. Here a convoluted power device is presented by hybridizing internally a solid Li‐ion battery (SLB) and a triboelectric nanogenerator (TENG), so that the two units are one inseparable entity. The fabricated device acts as a TENG that can deliver a peak output power of 7.4 mW under a loading resistance of 7 MΩ, while the device also acts as an SLB to store the obtained electric energy. The device can be mounted on a human shoe to sustainably operate a green light‐emitting diode, thus demonstrating potential for self‐powered wearable electronics. 相似文献
228.
John B. Cook Hyung‐Seok Kim Terri C. Lin Chun‐Han Lai Bruce Dunn Sarah H. Tolbert 《Liver Transplantation》2017,7(2)
A synthesis methodology is demonstrated to produce MoS2 nanoparticles with an expanded atomic lamellar structure that are ideal for Faradaic‐based capacitive charge storage. While much of the work on MoS2 focuses on the high capacity conversion reaction, that process is prone to poor reversibility. The pseudocapacitive intercalation‐based charge storage reaction of MoS2 is investigated, which is extremely fast and highly reversible. A major challenge in the field of pseudocapacitive‐based energy storage is the development of thick electrodes from nanostructured materials that can sustain the fast inherent kinetics of the active nanocrystalline material. Here a composite electrode comprised of a poly(acrylic acid) binder, carbon fibers, and carbon black additives is utilized. These electrodes deliver a specific capacity of 90 mAh g?1 in less than 20 s and can be cycled 3000 times while retaining over 80% of the original capacity. Quantitative kinetic analysis indicates that over 80% of the charge storage in these MoS2 nanocrystals is pseudocapacitive. Asymmetric full cell devices utilizing a MoS2 nanocrystal‐based electrode and an activated carbon electrode achieve a maximum power density of 5.3 kW kg?1 (with 6 Wh kg?1 energy density) and a maximum energy density of 37 Wh kg?1 (with 74 W kg?1power density). 相似文献
229.
230.