Nanoscale
·
2022
·Vol. 15
·期 2
·791-801
·
IF 8.307
Hui Xu,Xiaoxi Liu,Wenlu Sun,Guanghui Xu,Yihong Tong,Hongyuan Xu,Jiawei Li,Zhao Kong,Yong Wang,Zhiyong Lin,Hong Jin,Hongwei Chen
Currently, a variety of binders are developed to inhibit the rapid capacity fading of Si. The Si anodes are mainly enhanced by the chemical bonding effect on the surface of conventional solid-state binders. However, with a huge volume change of silicon, solid binders are easily deactivated. Herein, a semi-fluid binder termed GPC is designed based on a viscoelastic crosslinking network with abundant active sites and self-healing performance. The backbone of the binder network is in situ synthesized using guar gum (GG), polyacrylic acid (PAA), and citric acid (CA). Serving as the flexible joints and the plasticizer of the network, CA small molecules remarkably improve the viscoelasticity of the binder to tolerate the volume change of Si via rearranging particles in the network during cycling. Moreover, CA can form a layer of surface coating on Si to stabilize the SEI for long-term electrochemical performance. As a result, the Si@GPC electrode shows excellent cycling stability and exhibits a superb capacity of 1292 mA h g−1 after 1000 cycles at 2 A g−1. This work illustrates the advantages and prospects of designing semi-fluid binders for high-performance batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
PubMed
高影响因子
Matter
·
2024
·
IF 17.3
Xun Guo,Hu Hong,Qing Li,Jiaxiong Zhu,Zhuoxi Wu,Yanbo Wang,Shuo Yang,Zhaodong Huang,Yan Huang,Nan Li,Chunyi Zhi
Rechargeable zinc metal batteries (ZMBs) are promising for fabricating low-cost, safe, and high-energy-density storage systems. However, ZMBs typically undergo interfacial side reactions and cathode dissolution during cycling, resulting in the depletion of active materials and performance decay of batteries. Here, we develop a localized high-concentration fluorinated electrolyte featuring a high fluorine/oxygen atomic ratio (388.72%) with beneficial solvation chemistry, fostering the simultaneous formation of a cathode-electrolyte interphase (CEI) enriched with C–F bonds and a ZnF 2 -dominant solid-electrolyte interphase (SEI). The constructed robust electrode-electrolyte interfaces (EEIs) contribute to dendrite-free zinc deposition and a highly stable cathode, demonstrating soft-packed Zn||Mn-doped V 2 O 5 batteries with an exceptional energy density (91.25 Wh kg −1 cathode+anode ) and capacity retention (90.5%) over 500 cycles employing a limited zinc supply. The anode-free ZMBs deliver a record power density of 153.9 Wh kg −1 cathode+anode with a high capacity retention of 80.2% over 1,500 cycles. This research provides significant insights for interface construction in multivalent ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Jin-Xin Xue,Si-Xin Jia,Tian-Qi Xiang,Jian-Jun Zhou,Lin Li
Although silicon (Si) has a high theoretical capacity, the large volume expansion during lithiation has greatly hindered its application in high-energy-density lithium-ion batteries (LIBs). Among the strategies for improving the performance of Si anode, the role of binders should not be underestimated. Here, a novel strategy for designing a cross-linkable binder for Si anode has been proposed. The binder with hydroxyl and nitrile groups can be in situ covalently cross-linked through the amide group in the batteries. The cross-linked binder (c-POAH) shows high elasticity and strong adhesion to Si particles and the current collector. Si||Li half coin cells using the c-POAH binder have excellent cycle performance and the capacity retention ratio is 67.1% after 100 cycles at 0.2 C. Scanning electronic microscopy images show that the c-POAH binder can contribute to suppressing the pulverization of the Si anode. Moreover, the investigation with X-ray photoelectronic spectrum demonstrates that the decomposition of the liquid electrolyte on Si anode has been mitigated and the c-POAH binder can promote the formation of a more stable SEI film. Our strategy of endowing the binder with good elasticity through in situ cross-linking has opened up a new route for developing binders, which will definitely promote the application of Si anodes in high-energy-density LIBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2024
·Vol. 36
·期 25
·2400656
·
IF 27.4
Hanchen Wang,Yingtian Liu,Mingze Jiang,Yu-Xing Yao,Chunhua Hu,Chong Yan,Qiang Zhang,Luming Li
The advanced lithium-ion batteries that can tolerate zero-volt storage (ZVS) are in high demand for implantable medical devices and spacecraft. However, ZVS can raise the anode potential, leading to Cu current collector dissolution and solid-electrolyte interphase (SEI) degradation, especially at 37 °C. In this contribution, by quantitatively regulating the dosage of Li 6 CoO 4 cathode additives, controllable potential of the working anode under abusive-discharge conditions is demonstrated. The addition of Li 6 CoO 4 keeps zero-crossing potential (ZCP) and the potential of ZVS below 2.0 V (vs Li/Li + ) for LiCoO 2 |mesocarbon microbead cells at 37 °C. The capacity retention ratio (CRR) increases from 69.1% and 35.9% to 98.6% and 90.8% after 10 and 20 days of ZVS, respectively. The Cu dissolution and SEI degradation are effectively suppressed, while the over-lithiated cathode exhibits high reversible capacity after ZVS. The limiting conditions of long-term ZVS are further explored and a corresponding guide map is designed. When quantitatively regulating ZCP and the potential in ZVS, Cu dissolution, SEI degradation, and irreversible conversion of the cathode constitute the limiting conditions. This contribution designs the most reasonable potential range for ZVS protection at 37 °C, and realizes the best CRR record through precise potential regulation for the first time.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Jun Wei,Zhijie Guo,Fei Wang,Xianyi Zhao,Sihan Chen,Xinyao Zhang,Xinyao Wang,Ye Liang,Xiaobing Wang
Uncontrolled side reactions between lithium metal and organic electrolytes seriously deteriorates the stability of corresponding battery due to the non-uniform Li + deposition. Using lithium nitrate (LiNO 3 ) as an additive can adjust the components in solid-electrolyte-interphase (SEI) for optimizing of lithium metal interface . However, the low solubility and rapid consumption of LiNO 3 in ester-based electrolytes limit its further application. Herein, a kind of suspension electrolyte containing micron-sized LiNO 3 particles is reported to realize a full gradient compensation against the consumption of NO 3 − . Benefiting from the uniformly dispersion of LiNO 3 particles, a SEI layer containing even-distributed Li 3 N and LiN x O y with high content is constructed that promotes the rapid and uniform plating of Li + . Consequently, the Li/Cu batteries present a polarization of only 15–20 mV, and exhibit a consistent performance for 230 cycles with the CE of 98.1%, which is 4 times than that of conventional carbonate electrolytes. In addition, the cycling life of the assembled Li/NCM811 batteries can be extended to 260 cycles with a high capacity retention of 82.4 %.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Simeng Wang,Youchun Yu,Shaotong Fu,Hongtao Li,Jiajia Huang
The absence of control over carriers transport during electrochemical cycling, accompanied by the deterioration of the solid electrolyte interphase (SEI) and the growth of lithium dendrites, has hindered the development of lithium metal batteries. Herein, a separator complexion consisting of polyacrylonitrile (PAN) nanofiber and MIL-101(Cr) particles prepared by electrospinning is proposed to bind the anions from the electrolyte utilizing abundant effective open metal sites in the MIL-101(Cr) particles to modulate the transport of non-effective carriers. The binding effect of the PANM separator promotes uniform lithium metal deposition and enhances the stability of the SEI layer and long cycling stability of ultra-high nickel layered oxide cathodes. Taking PANM as the Li || NCM96 separator enables high-voltage cycling stability, maintaining 72% capacity retention after 800 cycles at a charging and discharging rate of 0.2 C at a cut-off voltage of 4.5 V and 0 °C. Meanwhile, the excellent high-rate performance delivers a specific capacity of 156.3 mA h g −1 at 10 C. In addition, outstanding cycling performance is realized from −20 to 60 °C. The separator engineering facilitates the electrochemical performance of lithium metal batteries and enlightens a facile and promising strategy to develop fast charge/discharge over a wide range of temperatures.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Small
·
2023
·Vol. 20
·期 2
·2305639
·
IF 13.3
Shiwei Xu,Qiu Fang,Jipeng Wu,Suting Weng,Xiaoyun Li,Qiuyan Liu,Qiyu Wang,Xiqian Yu,Liquan Chen,Yejing Li,Zhaoxiang Wang,Xuefeng Wang
Prelithiation is an essential technology to compensate for the initial lithium loss of lithium-ion batteries due to the formation of solid electrolyte interphase (SEI) and irreversible structure change. However, the prelithiated materials/electrodes become more reactive with air and electrolyte resulting in unwanted side reactions and contaminations, which makes it difficult for the practical application of prelithiation technology. To address this problem, herein, interphase engineering through a simple solution treatment after chemical prelithiation is proposed to protect the prelithiated electrode. The used solutions are carefully selected, and the composition and nanostructure of the as-formed artificial SEIs are revealed by cryogenic electron microscopy and X-ray photoelectron spectroscopy. The electrochemical evaluation demonstrates the unique merits of this artificial SEI, especially for the fluorinated interphase, which not only enhances the interfacial ion transport but also increases the tolerance of the prelithiated electrode to the air. The treated graphite electrode shows an initial Coulombic efficiency of 129.4%, a high capacity of 170 mAh g −1 at 3 C, and negligible capacity decay after 200 cycles at 1 C. These findings not only provide a facile, universal, and controllable method to construct an artificial SEI but also enlighten the upgrade of battery fabrication and the alternative use of advanced electrolytes.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2019
·Vol. 9
·期 1
·1-16
·
IF 4.011
An Fuqiang,Zhao Hongliang,Zhou Weinan,Ma Yonghong,Li Ping
Recently, high-energy density cells containing nickel-rich cathodes and silicon-based anodes have become a practical solution for increasing the driving range of electric vehicles. However, their long-term durability and storage performance is comparatively poor because of the unstable cathode-electrolyte-interphase (CEI) of the high-reactivity cathode and the continuous solid-electrolyte-interphase (SEI) growth. In this work, we study several electrolyte systems consisting of various additives, such as S-containing (1,3,2-dioxathiolane 2,2-dioxide (DTD), DTD + prop-1-ene-1,3-sultone (PES), methylene methanedisulfonate (MMDS)) and Si-containing (tris(trimethylsilyl) phosphate (TTSP) and tris(trimethylsilyl) borate (TMSB)) compounds, in comparison to the baseline electrolyte (BL = 1.0 M LiPF 6 + 3:5:2 w-w:w EC: EMC: DEC + 0.5 wt% lithium difluoro(oxalato)borate (LiDFOB) + 2 wt% lithium bis(fluorosulfonyl)imide (LiFSI) + 2 wt% fluoroethylene carbonate (FEC) + 1 wt% 1,3-propane sultone (PS)). Generally, electrolytes with Si-containing additives, particularly BL + 0.5% TTSP, show a lower impedance increase in the full cell, better beginning-of-life (BOL) performance, less reversible capacity loss through long-term cycles and better storage at elevated temperatures than do electrolytes with S-containing additives. On the contrary, electrolytes with S-containing additives exhibit the advantage of low SEI impedance but yield a worse performance in the full cell than do those with Si-containing additives. The difference between two types of additives is attributed to the distinct function of the electrodes, which is characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS), which was performed on full cells and half cells with fresh and harvested electrodes.
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 A
·
2019
·Vol. 8
·期 4
·2066-2073
·
IF 10.733
Chuankai Fu,Yulin Ma,Shuaifeng Lou,Can Cui,Lizhi Xiang,Wei Zhao,Pengjian Zuo,Jiajun Wang,Yunzhi Gao,Geping Yin
Succinonitrile (SN)-based electrolytes are attractive due to their considerable ionic conductivity and high oxidative stability. However, the spontaneous chemical side-reactions between SN and Li-metal restrict the extensive applications of such electrolytes in next-generation advanced Li-metal batteries. Herein, we report a novel SN-based electrolyte SN–DLi–FEC which combines the dual-salt (lithium bis(trifluoromethane sulfonimide) (LiTFSI) and lithium difluoro(oxalato)borate (LiODFB)) and the fluoroethylene carbonate (FEC) additive. Compared with other SN-based electrolytes such as SN–SLi–FEC (single salt combined with FEC), SN–DLi–FEC can form a more stable and durable organic–inorganic composite SEI film rich in the B–F bond and LiF on the surface of the Li-metal anode. As a result, interfacial compatibility of the SN-based electrolytes and the Li-metal anode can be significantly enhanced. Moreover, SN–DLi–FEC shows high oxidation resistance, high ionic conductivity and good thermal stability. The LiCoO2 (LCO)/Li battery equipped with SN–DLi–FEC exhibits excellent electrochemical performances at room temperature (RT) and high temperature, and high thermal safety. The novel SN-based electrolyte prepared in this work could be a promising candidate providing better reliability and safety for the development of Li-metal batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Jing Zhong,Zhixing Wang,Xiaoli Yi,Xinhai Li,Huajun Guo,Wenjie Peng,Hui Duan,Jiexi Wang,Guochun Yan
Lithium (Li) metal is considered an attractive anode for high-energy Li secondary batteries, but it suffers from a short cycle life and serious safety hazards due to its high reactivity and dendritic growth. A potential approach is to construct a stable artificial SEI film. Herein, we report a polymer coating that is composed of LiTFSI and PVDF-HFP, which is spread onto the Li foil (25 μm) by the blade coating method (abbreviated as Li-PH@Li). During drying, LiTFSI reacts with Li metal to form LiF that is distributed evenly in the coating layer, thus improving the mechanical strength of the coating. In addition, the coating layer could selectively transport the Li-ions and delay the transport of solvent and PF6–, alleviating the side reaction between Li metal and electrolyte. Therefore, a dense Li deposition layer is obtained during a long cycle. Consequently, the Li-PH@Li||LFP coin cell with a low N/P ratio (3:1) could maintain 355 cycles at 0.5 C (0.79 mA cm–2), while only 240 cycles for the bare Li||LFP cell. Moreover, a lean Li-PH@Li||LFP pouch cell, whose N/P ratio is 1.9:1, can also sustain more than 200 cycles. This work paves a new approach to protect Li metal anodes for high-performance Li metal batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2022
·
IF 20.831
Yan Liu,Yuan Li,Long Chen,Fang Yan,Zhihong Lin,Junmou Wang,Jingyi Qiu,Gaoping Cao,Biyan Wang,Hao Zhang
For high-specific energy Li batteries, hybrid anodes with graphite and Li metal are promising. However, the degradation of graphite-Li metal hybrid anodes during long cycles has been significantly fastened by dendritic Li growth and dead Li accumulation ascribed to the inferior solid electrolyte interphase (SEI). Efficient material construction strategies are highly demanded to inhibit the deactivation of graphite intercalation compounds (GICs: LiC 12 , LiC 6 , etc.) in graphite-Li metal hybrid anodes. Here, we introduced a physical-chemical modification strategy. Which is acted by a combination of a LiF-rich and elastic SEI and preset void in the composite electrodes, which was realized by Cu mesh current collectors, resulting in the retardant of the accumulation of dead Li and side reaction sediments on graphite surface and the retaining of the Li + insertion channels. The strategy ensured the long-term activity of both GICs and Li metal in graphite-Li metal hybrid anodes. Thus, the hybrid anodes obtain higher reversibility of both the lithium-ion insertion/deintercalation and Li metal deposition/dissolution processes. The batteries can maintain a specific capacity of up to 500 mAh/g, with an average CE of 98.5% for 85 cycles. This work presents a novel and effective methodology to realize the high reversibility of the high-capacity graphite-Li metal hybrid anodes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Xiaodong Liu,Guanyu Li,Feng Wu,Cunzhong Zhang
Lithium metal batteries (LMB) have received widespread attention due to their high energy density and potential commercial value. The relationship between the rate performance, cycling performance, microstructure of the deposition layer, and SEI of lithium anodes has not yet been elucidated. Here, we investigated the cycling performance and rate characteristics of metal lithium anodes in classic carbonate electrolytes containing different supporting salts. And the microstructure and chemical information of the lithium anode surface were analyzed. In addition, microelectrode technology was used to study the dynamic behavior and reaction of electroplating/stripping lithium process under different polarization conditions (current density), revealing the apparent performance, microscopic visual information, and dynamic causes and mechanisms of SEI. The results indicate that in carbonate electrolytes containing LiBOB and LiPF 6 , the cycling performance of lithium anodes, the microstructure of the deposition layer, and SEI can be significantly improved. Microelectrode research has revealed a close causal relationship between the stability and coordination of each basic step, including lithium ion mass transfer, interface charge transfer, and surface crystallization kinetics parameters , and the apparent performance of lithium anodes. This correlation can serve as a dynamic evaluation basis for future selection and optimization of operating and manufacturing conditions.
研究领域:
电化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）